Atomic Radius Definition and Trend

Atomic Radius Definition and Trend Atomic radius is a term used to describe the size of an atom, however, there is no standard definition for this value. An atomic radius may refer to the ionic radius, covalent radius, metallic radius, or van der Waals radius. Atomic Radius Periodic Table Trends No matter what criteria you use to describe the atomic radius, the size of an atom is dependent on how far out its electrons extend. The atomic radius of an element tends to increase the further down you go in an element group. Thats because the  electrons become more tightly packed as you move across the periodic table, so while there are more electrons for elements of increasing atomic number, the atomic radius may decrease. The atomic radius moving down an element period  or column tends to increase because an additional electron shell is added for each new row. In general, the largest atoms are at the bottom lefthand side of the periodic table. Atomic Radius Versus Ionic Radius The atomic and ionic radius is the same for atoms of neutral elements, such as argon, krypton, and neon. However, many atoms of elements are more stable as atomic ions. If the atom loses its outermost electron, it becomes a cation or positively charged ion. Examples include K and Na. Some atoms might lose multiple outer electrons, such as Ca2. When electrons are removed from an atom, it might lose its outermost electron shell, making the ionic radius smaller than the atomic radius. In contrast, some atoms are more stable if they gain one or more electrons, forming an anion or negatively charged atomic ion. Examples include Cl- and F-. Because another electron shell isnt added, the size difference between the atomic radius and ionic radius of an anion isnt as much as for a cation. The anion ionic radius is the same as or slightly larger than the atomic radius. Overall, the trend for the ionic radius is the same as for the atomic radius: increasing in size moving across and decreasing moving down the periodic table. However, its tricky to measure the ionic radius, not least because charged atomic ions repel each other. Measuring Atomic Radius You cant put atoms under a normal microscope and measure their size- although you can kind of do it using an atomic force microscope. Also, atoms dont sit still for examination; they are constantly in motion. Thus, any measure of atomic (or ionic) radius is an estimate that contains a large margin of error. The atomic radius is measured based on the distance between the nuclei of two atoms that are barely touching each other, which means the electron shells of the two atoms are just touching each other. This diameter between the atoms is divided by two to give the radius. Its important, however, that the two atoms dont share a chemical bond (e.g., O2, H2) because the bond implies an overlap of the electron shells or a shared outer shell. The atomic radii of atoms cited in the literature are usually empirical data taken from crystals. For newer elements, the atomic radii are theoretical or calculated values, based on the probable size of the electron shells. How Big Are Atoms? A picometer is 1-trillionth of a meter. The atomic radius of the hydrogen atom is about 53 picometers.The atomic radius of an iron atom is about 156 picometers.The largest measured atom is cesium, which has a radius of about 298 picometers.

Euthenasia essays

Euthenasia essays Euthanasia is also known as mercy killing, but it is hard-core murder. Killing is killing, it cannot be justified as mercy killing or killing out of compassion. Taking another human life is plain wrong, and there cannot be any exceptions whatsoever. The act of euthanasia proves to the society that life is not precious and can be ended just like that. Terminally ill patients, rather than giving up and killing themselves, should spend time with their families and doing things that they want to do. The patients should let nature take its course and not await death; rather they should enjoy and live life to the fullest, so they wont have any regrets. Euthanasia is not a safe or respectable practice and it should remain illegal, not just in Canada, but in other parts of the world. Life is a sacred gift. If a society loses its belief that life is a gift, the life in that culture will be meaningless and death will be at a very cheap cost. The Doctors in Nazi Germany did not believe that life was a sacred gift. They began authorizing euthanasia for mentally ill and deformed individuals. From mentally ill and deformed people, they started authorizing euthanasia for the undesirables. Soon, they were able to justify the extermination of six million Jews, Poles, Evangelicals, and other that seemed expendable by Hitlers Third Reich. If a society feels that it is right to end life because it is not the quality that they want it to be, soon they will be justifying other atrocities by cloaking it with masks of compassion and realism. Even patients suffering from diseases that can be cured by euthanasia are speaking out against the act. Janice Elsner, a patient suffering from a progressing muscular dystrophy, believes that life is a gift no matter what the situation. A ssisted suicide is sending the opposite message that if someone is becoming an inconvenience or a burden, they can just ...

Deutsche Bank is a global universal bank. What are the advantages and Essay

Deutsche Bank is a global universal bank. What are the advantages and disadvantages of a global universal bank and what are som - Essay Example The Deutsche bank holds a record for being the only bank that has strived to achieve omnipresence. Evidently, universal banks exhibit multiple benefits to the clients, but a closer analysis reveals that they have certain disadvantages. This paper will highlight the advantages and disadvantages of universal banks. Moreover, the paper will analyse the issues that arise when handling tasks in the compliance department. Advantages of Universal Banks Universal banks offer their clients a diverse range of services to different clients having the opportunity to receive personalized services that conform to their banking needs. Usually individuals, groups, organizations, states and multi-national organizations exhibit varying financial needs. The fact that universal banks have the capacity to offer tailor-made services, they surpass other banks by offering each client service that conforms to personal financial needs. This is the reason why universal banks offer a high level of convenience t o the clients (Heller, Meaney & Murphy 2001, p. 78). They serve as a single-stop banks where one can access all the required financial needs. Evidently, such convenience receives emphasis from the presence of most universal banks in different regions, affording the clients an increased banking flexibility even beyond the borders. Recent research reveals that universal banks serve as critical contributors to the economy. This is because they have the capacity to support a diverse range of investments in different parts of the globe. Universal banks exert their effect on the entire economic system, altering the economic trends by providing financial breakthroughtwo different types of clients. Universal banks serve private household clients, offering arrange of appealing service packages appropriate for them (Palepu2007, p. 87). Moreover, universal banks offer a range of services to institutional clients empowering them to receive the required the financial boost to achieve their goals . This factor has served as a reliable solution to the financial problems of many institutions as they can form investment partnerships with universal banks. These services are offered at a relatively lowered funding cost compared to other banks. Evidently, universal banks register a low level of profiling costs, placing them in a better position to offer services at the lower funding cost compared to other banks. Moreover, these banks exhibit a lower funding cost themselves, explaining further why they favour all types of clients. Universal banks have served to increase the willingness of credit borrowers, a factor that has contributed to the rising returns for clients who wish to save. This has been especially advantageous to governments that exhibit financial needs that require borrowing. Moreover, this proves to be highly beneficial to other clients, and contributes to a surging growth. This has given rise to an evident rise instability of the economies by causing as the spread of innovations in different regions in the globe (PadoanBrenton & Boyd 2003, p. 34). Disadvantages Although universal banks exhibit all these benefits, they face a surging pressure to satisfy all the clients in different regions.These banks face the compulsion of maintaining a high quality of their services (Lambert&Ioma2005, p.98). They have to ensure that they are responsive; clear in communication, prompt, and a high level of integrity in offering

International Political Theorie Coursework Example | Topics and Well Written Essays - 4500 words

International Political Theorie - Coursework Example Everyone ue theorie--whether he or he know it or not--and diagreement about policy uually ret on more fundamental diagreement about the baic force that hape international outcome. Take, for example, the current debate on how to repond to China. From one perpective, China' acent i the latet example of the tendency for riing power to alter the global balance of power in potentially dangerou way, epecially a their growing influence make them more ambitiou. From another perpective, the key to China' future conduct i whether it behavior will be modified by it integration into world market and by the (inevitable) pread of democratic principle. From yet another viewpoint, relation between China and the ret of the world will be haped by iue of culture and identity: Will China ee itelf (and be een by other) a a normal member of the world community or a ingular ociety that deerve pecial treatment (Necati , 447-477) In the ame way, the debate over nato expanion look different depending on which theory one employ. From a "realit" perpective, nato expanion i an effort to extend Wetern influence--well beyond the traditional phere of U.. vital interet--during a period of Ruian weakne and i likely to provoke a harh repone from Mocow. From a liberal perpective, however, expanion will reinforce the nacent democracie of Central Europe and extend nato' conflict-management mechanim to a potentially turbulent region. A third view might tre the value of incorporating the Czech Republic, Hungary, and Poland within the Wetern ecurity community, whoe member hare a common identity that ha made war largely unthinkable. Where Are We Coming From The tudy of international affair i bet undertood a a protracted competition between the realit, liberal, and radical tradition. Realim emphaize the enduring propenity for conflict between tate; liberalim identifie everal way to mitigate thee conflictive tendencie; and the radical tradition decribe how the entire ytem of tate relation might be tranformed. The boundarie between thee tradition are omewhat fuzzy and a number of important work do not fit neatly into any of them, but debate within and among them have largely defined the dicipline. Realim Realim wa the dominant theoretical tradition throughout the Cold War. It depict international affair a a truggle for power among elf-intereted tate and i generally peimitic about the propect for eliminating conflict and war. Realim dominated in the Cold War year becaue it provided imple but powerful explanation for war, alliance, imperialim, obtacle to cooperation, and other international phenomena, and becaue it emphai on competition wa conitent with the central feature of the American-oviet rivalry (Daniel , 111-128) Liberalim The principal challenge to realim came from a broad family of liberal theorie. One trand of liberal thought argued that economic interdependence would dicourage tate from uing force againt each other becaue warfare would threaten each ide' properity. A econd trand, often aociated with Preident Woodrow Wilon, aw the pread of democracy a the key to world peace, baed on the claim that democratic tate were inherently more peaceful than authoritarian tate. A third, more recent theory argued that international intitution uch a the International Energy Agency and the

Fukushima power plant disaser Essay Example | Topics and Well Written Essays - 1500 words

Fukushima power plant disaser - Essay Example The events resulted in an explosion and partial nuclear meltdown in three operational reactors of the plant. However, it never caused serious fatalities given the rapid response including evacuation efforts. Even though the disaster never caused many deaths, it comprises of the significant occurrences in the global history. It remains as the biggest nuclear disaster that took the authorities about 14 days to completely shut down the facility and several years to decommission and restore the effects. The collapse began when the tsunami severely damaged three operational reactors in plant number 1 and 2 at the Fukushima Daiichi. Subsequently, the shutdown stopped operations of the site by stopping the backup diesel generators thereby leading to a site blackout. The blackout and tsunami resulted in the failure of seawater pumps thus hindering cooling of the reactors. It then led to the meltdowns in the three primary reactors of the facility. In response, the government issued an evacuation notice for people within the 3-kilometre radius and later 10 km radius because of the magnitude of the challenge (Fukushima Accident). The radiations contaminated the Pacific Ocean water and caused massi ve air pollution. It also led to displacements of people, disruption of the way of life, the decline in the economic activities. The Tokaimura accident in 1999 triggered the development of radiation-resistant robots. However, a task force that included the representatives of Tokyo Electric Power Company (TEPCO) discredited the robots in 2002. Besides, no nation or plant projected the possibility of occurrence of a disaster similar to the Chernobyl. The firms also showed belief in the skilled employees to manage and limit the occurrence of nuclear accidents. Hence, dissolution of radiation robots enhanced Japan’s vulnerabilities and limited the response options to the Fukushima disaster (Lochbaum, Lyman and Stranahan 40). Earlier on, the Tokyo Electric Power

The Trojan Horse Virus: An Overview

The Trojan Horse Virus: An Overview Another type of malware that is not technically a virus because there is usually no auto-replication is a Trojan horse program, which seems to be something useful, as a free utility, but actually contains some kind of malware. The unhappy about a Trojan program that is running the software users willingly and still do not know what is causing problems on their systems. Rootkits are a form of Trojan horse programs that can monitor the traffic from a computer, monitor keystrokes and capturing passwords. Are the most modern backdoor on one system and are between the most insidious Trojan horse software because they can mask that the system has been compromised by changing the file system and drivers needed for the normal operation of the computer. Viruses A virus is a program that spreads, replicating it in other programs or documents. Its only purpose is to interrupt the operation of your computer or network by deleting or corrupting files, disk formatting or by using large quantities of computer resources. Viruses and worms that spread through e-mail attachments were common place for years. They are simple to avoid; just dont open any attachments from emails sent by someone who you arent expecting a message. Even if you know the sender, careful; malware programs may use address book from an e-mail program to send messages, causing you to believe that the message is safe. In fact, most virus scanners detect a virus or worm contained in an e-mail message and often excludes the annex before it ever reaches your Inbox, but if the virus is very new, it cannot be detected. Worm A worm is similar to a virus that replicates automatically, but a worm does not attach to another program; indeed, it is a standalone program. Worms are now more common than viruses, because with the Internet and network connectivity, worms in general do not need help to spread. Whereas a virus requires a user to run the program that contains the virus to operate and then copy this file to spread a worm can do their work without any help and can propagate through a network connection available. Some insidious actions that a worm can commit include using the network bandwidth, deleting files, send e-mails and creating backdoors in computers. NETWORK SECURITY POLICY Without a security policy, the availability of your network can be compromised. The policy begins with the assessment of risk to network and build a team to respond. Continuation of the policy requires the practical implementation of change management and monitoring of network security for breaches of security. Finally, the review process modifies the existing policy and adapts the lessons learned. The last area of responsibility is the answer. While often network monitoring identifies a security violation, the security team members that are the real solution and fixing of such violation. Each Member of the security team should know in detail the security features provided by the equipment in its operational area. While we define the responsibilities of the team as a whole, you must define the individual roles and responsibilities of the security team members in your security policy. Approving Security Changes Security changes are defined as changes to network equipment that can have an impact on overall network security. Your security policy must identify the requirements of specific security configuration in non-technical terms. In other words, instead of setting a requirement as no outside sources FTP connections will be allowed through the firewall, set the requirement as outside connections should not be able to retrieve files from inside the network. You need to define a unique set of requirements for your organization. The security team should review the list of simple language requirements to identify issues of design requirements or specific network configuration. After the team created the network configuration changes necessary to implement the security policy, you can apply these possible future configuration changes. Although it is possible for the security team review all changes, this process enables them to only review the changes that risk sufficient to justify special treatment. We recommend that the security team to review the following types of changes: Any change in the firewall configuration. Any amendment (ACL) of access control lists. Any changes to the configuration of the simple network management protocol (SNMP). Any change or update software that differs from the list of approved software revision. We recommend that you also meet the following guidelines: Change passwords for network devices on a routine basis. To restrict access to network devices to a list of approved personnel. Ensure that the current revision levels of environments software network servers and equipment are in accordance with the security configuration requirements. Monitoring Security of Your Network Security monitoring is similar for network monitoring, except focuses on the detection of network changes that indicate a security breach. The starting point for security monitoring is to determine what constitutes a violation. Conduct a risk analysis, we identify the level of monitoring required based on the threat to the system. By adopting security changes, we identify specific threats to the network. Looking at both of these parameters, I will develop a clear picture of what you need to monitor and frequency. In risk analysis matrix, the firewall is considered a high-risk network, indicating that he should follow. In approving security changes section, youll find that you must monitor for changes to the firewall. This means that the SNMP polling agent should monitor things such as failed login attempts, unusual traffic, changes to the firewall, access granted to the firewall and configuration of connections through the firewall. Following this example, create a monitoring policy to each area identified in your risk analysis. We recommend that the equipment of low risk, medium risk equipment weekly and daily monitoring equipment high-risk per hour. If you need more rapid detection, monitor in a short time interval. Finally, your security policy should address how to notify the security team of security breaches. Often, your network monitoring software will be the first to discover the breach. It should trigger a notification to the operations centre, which in turn shall notify the security team using a pager number, if necessary.

home school Essay -- essays research papers

Home schooling is another way for a child to receive his or her education. It is one of many alternatives to regular schooling (classrooms and schools). It is the oldest alternatives to regular schooling and one of the most effective. There are many true stories proving that home schooling is an effective and often successful way to teach you child. But first lets talk about home schooling began in the U.S. Home schooling started in colonial America, (around 1777 to 1783) for most colonial homes, home schooling was the only thing available. According to the Texas home school coalition, our founding fathers had a strong conviction that children should be able to read for the very important reason of reading the Bible for the spiritual benefits and truth it contained (Texas home school coalition 1997). Sometimes parents would hire a tutor to teach their children subjects in which they did not feel qualified (Texas home school coalition 1997). It wasn’t till later that education developed into religious training in the universities in the Ivy League. These universities were strictly there to train ministers. According to the THSC (Texas Home School Coalition), the entrance requirements often included being able to read and translate Hebrew, Latin, and Greek. Eventually, communities and states began to establish schools funded by the government however, these schools still had a strong religious up bringing. Home schooling has been around for a long time. But most people won’t know the steps it takes to successfully home school a child. But, to fully understand these steps one must first learn the basics of home schooling. Home schooling means to teach or be taught at home. Home schooling is to teach children at home, or be taught at home rather than in the public school system, using an approved curriculum. Of course the parents have to have a degree to teach their children (except in New Jersey). According to the New Jersey Education laws all high schools in New Jersey will accept students who were taught by their parents. The parents have to bring proof of the child’s progress and the names of the textbooks the child has used (NJ Education Laws 1). I do not think many colleges can accept students that went through home schooling at a high school level. These laws differ from state to state. California's Department of Education maintains that you can't hom... ...com. 2002 30 Mar. 2003 Rasicot, Julie. â€Å"College without a campus.† Good Housekeeping. Sep. 1997: p156 Academic search premier. EBSCOhost. Middlesex County College Library, Edison. 20 Mar. 2003 Texas home schooling coalition. â€Å"A home school history lesson.† Texas Home Schooling Coalition. 1997 3 Apr. 2003 Kendler, KS. â€Å"Social Phobia† Psychology Today. 1995 3 Apr. 2003 Wilkes, Byron. â€Å"If all you have is a hammer†¦can you build a solid foundation for your child’s learning?† The Old House. 2000-2003 Hallowell, Edward M. â€Å"What I’ve learned from ADD.† Psychology Today. May/Jun 97 15 Apr. 2003 Ray, Brian D. â€Å"Home Schooling: The Ameliorator of Negative Influences on Learning?† PJE: Peabody Journal of Education. 2000 Academic search premier. EBSCOhost. Middlesex County College Library, Edison. 15 Apr. 2003 New York Education laws. â€Å"NY education code for homeschooling.† Gomilpitas.com. 2002 16 Apr. 2003 California’s Education laws. â€Å"NY education code for homeschooling.† Gomilpitas.com. 2002 16 Apr. 2003 Bruner, Kimberly. â€Å"Homeschooling: A natural.† Countryside & Small Stock Journal. 2001 Academic search premier. EBSCOhost. Middlesex County College Library, Edison. 15 Apr. 2003