The Composition of Chemistry
Abby Hackenberger
Chemistry 110
June 14th, 2015
The Composition of Chemistry
Chemistry is made up of so many different things, but at the core of it all is the understanding of the periodic nature and properties of atoms and molecules. The concepts of chemistry are based around these ideas as everything in chemistry is created from atoms. The understanding of the makeup of atoms has come a long way since the beginning. Now we know that atoms are made up of a nucleus, which houses the protons & neutrons, and outer shells, which hold electrons. The charges from the protons and electrons even each other out to make the charge of an atom neutral. Sometimes though, in certain reactions, atoms give up or take in certain charged particles to make themselves positive of negative ions. Neutrons have no electrical charge while protons have a positive charge and electrons have a negative charge. Elements on the periodic table are identified by how many protons they have in their nucleus. This is how each element gets their atomic number. Atoms are organized on the periodic table by the atomic mass and atomic number, as well as in like groups of elements which behave in similar ways. A molecule is the smallest particle of a substance which still exhibits the properties of that substance. Molecules are two or more atoms held together by chemical bonds and have no electric charge.
Mendeleev is the father of the periodic table, and he organized it in a very precise and methodical way. He researched different types of elements and organized them together in groups on the table in relation to their types as well as the way in which they react with others (families or groups). Halogens and alkali metals are extremely reactive, whereas noble gases do not react at all. Noble gases are chemically inert; they are stable and will not combine with other elements to form compounds. They do not combine with other elements because they have the maximum number of valence electrons; therefore they have a full outer shell and do not take part in chemical reactions. These are the safest elements. Alkali metals, on the other hand, are very reactive and can cause dangerous explosions when combined with other elements. Halogens are very reactive nonmetals. Alkali metals are in the first period on the periodic table, they have 1 valence electron. Halogens are in the 7th period of the main elements and have 7 valence electrons. Both are highly reactive and want to complete their outer shell so they often combine to do so.
When molecules form from atoms of similar families (for example H20 and H2S) they share some characteristics, but do not necessarily act the same. While H2O and H2S have almost identical molecular structures and are both bent, H2O is the only one affected by hydrogen bonds. H2S has a much lower boiling point (as it is affected by the London dispersion forces) and is not
Nursing theories and their importance in nursing Jennifer J. Wilson Chamberlain College of Nursing NR 501: Theoretical Basis for Advanced Nursing Instructor Berens 1/12/15 Nursing Theory is often defined as,” an organized framework of concepts and purposes designed to guide the practice of nursing” (Medical Dictionary for the Health Professions and Nursing, 2012). Nursing theories can help patients, managers and other healthcare professionals to recognize what and how much that nurses do…
One of the requirements of the Generally Accepted Accounting Principles (GAAP) is that inventory should be recorded at LCM (lower cost or market) rule. According to the cost principle, a company’s assets are generally stated in the financial statements. When it comes to inventory, cost principle is deserted and lower of cost or market rule takes its place. The LCM says that inventory should be measured at the lower of cost or market value (Accounting Explained). Market value basically means the…
pension excise tax regulation. This proposal entitles employees seasonal and full time to obtain health insurance through the employers. This proposal also entitles employees who work at least 30 hours per week to obtain health insurance. This proposal affects me because I am working 40 hours a week and do obtain health insurance through the federal government. Write the public comment that you would submit to this proposal. If the proposed regulation deadline has already passed, write the comment…
Police History, Styles, and Issues Paper Jessica Redfield CJA 204 June 1st, 2015 Erica Veljica Police officers have been around since back in the colonial days. Back then, they were not called police officers they were called watchmen. Back then, every citizen was a watchmen and they did not receive pay for their duties. However, some wealthy citizens paid others to do their duty for them. People did not start getting paid to Philadelphia started paying them in…
Equilibration in the workplace Pamela Catchings ECO/561 May 4, 2015 Mathewos Kassa Equilibration in the workplace The market equilibration provides business organization to adjust too many different changes in the market. In this process the company is guiding the management to adjust to create market equilibrium. This will help the producers and purchasers to be on the same price with the same product. Equilibration is the process of moving between two equilibrium points as a result of some changes…
Globalization by definition is “the act extending an influence to all parts of the world.” Knowing that an influence can be good or bad, in the case of business globalization the control would not be enough, i.e. detrimental to humans and wildlife. (2 conclusion) Globalization can only be good for a planet if the ones in charge are responsible. Only if the ones in charge of the global business create laws that are good and treat people fairly can it ever work. In many occasions though, people are…
The Fundamentals of Macroeconomics ECON 372 March 10, 2014 Mr. Cain The Fundamentals of Macroeconomics Introduction into the Fundamentals of Macroeconomics It is the idea that considers the lack of interest there is in the economy dating back to the early 1900's. The economy over time was studied by scholars that made terms that better deal with our economy that developed the meaning of Micro/Macroeconomics. Currently macroeconomics deals with GDP (gross domestic product) that everyone faces…
Demonstrative Communication Paper Ronald McKenna BCOM/275 December 19, 2014 Dominic Rufino Demonstrative Communication Paper Demonstrative Communication is a form of communication that includes nonverbal and unwritten communication. Demonstrative communication involves facial expressions, body language, and tone of voice, hand gestures, and eye contact. Although demonstrative communication is non-verbal, this form of communication still involves listening. In addition, Demonstrative Communication…
CAREER LENGTH FOR NFL WIDE RECEIVERS Kristiann Saunders Spring 2013 PURPOSE STATEMENT Millions of boys throughout football’s history have dreamed of being an NFL player. They watch their heroes on TV, and hope…one day…to be one of them. However, it’s not as easy as it seems to get INTO the NFL, or to STAY in the…
Ethical Dilemma Paper Mark R. Mitchell ETH/321 June 1, 2015 John Pierce Ethical Dilemma Paper The video I choose from films on demand was Moyers & Company: Banking on Greed (2012). The ethical dilemma explained in the short video was the scandal in banking centering on Barclays Bank in London, and LIBOR. LIBOR stands for London Interbank Offered Rate, where a group of bankers establish a daily interest rate is influencing trillions of dollars of dealings throughout the globe, and some of these bankers…