Study Chemistry With English

Evidences of Chemical Reactions All chemical bonds posses potential energy.  In a chemical reaction this energy is changed when old bonds are broken and new bonds are formed. Chemical changes are different from physical changes.  When a physical change occurs there is no breaking and forming of bonds.  There are certain things that will help us identify if a chemical reaction has taken place.  We call these evidences of chemical reactions.   Light is given off: Potential energy in valance electrons is released in the form of light. Gas is given off: Indicates an increase in kinetic energy of the atom (compound) as it is changed to a gas. Temperature change: Exothermic is an increase in the speed of the molecules (heat). Exothermic is the taking in of energy. Color change: the increase or decrease of potential energy stored in new bonds. Precipitate formed: increase or decrease of potential energy in new bonds formed. Electrical potential: T...

CORROSION In general, corrosion is the destruction of metal objects due to environmental influences. The corrosion process can be explained electrochemically, for example in the process of ironing which forms iron oxide (F2O3.nH2O). Electrochemically, the process of ironing is an iron oxidation event of iron by oxygen from the air. Corrosion can also be interpreted as an attack that damages the metal because the metal reacts chemically or electrochemically with the environment. There is another definition which says that corrosion is the opposite of a metal extraction process from its mineral ore. For example, iron ore minerals in the wild are present in the form of iron oxide or iron sulphide compounds, after extracting and treating, an iron will be produced for the manufacture of steel or alloy steel. During use, the steel will react with the environment causing corrosion (back to the iron oxide compound). For iron metal is left open in the yard for a mo...

"Corrosive" Teacher   : Good Afternoon Class Students  : Good Afternoon ma'am Teacher   : Well, Can you guess what the stuff I bring? Students  : No ma'am, We don't know Teacher   : It's call hydrocloric acid solution Students  : Ohh Teacher   : Does anybody know the characteristic about hydrocloric acid solution from the way you see it? Amel       : I know Teacher    : Yes please Amel       : It has clear color ma'am Teacher    : exactly, anybody else? yes please Rika         : hydrocloric acid solution is a strong acid ma'am Teacher    : That's right! Oni          : But ma'am, why hydrocloric acid solution  it strong acid? Teacher    : Nice question! well that's because hydrocloric acid solution has mixed by 2 elements, which is hydrogen and cl have strong ion bond, so that's can make a strong power to create...

A QUANTUM DYNAMIC APPROACH TO THE CONDENSATION PROCESSES OF ZINC ATOMS BY THE INNER-CORE EXCITATION DUE TO ION RECOMBINATION  Mitsugi Hamasaki1*, Masumi Obara1 , Kozo Obara1 , Hirotaka Manaka1 1 Graduate School of Science and Engineering Kagoshima University, Korimoto 1-21-40, Kagoshima, 8900065, Japan ABSTRACT          Isolated atoms in group II-B such as zinc (Zn), cadmium (Cd), and mercury (Hg) are chemically stable. These atoms are important in the formation of excimer. Zinc in particular has been investigated by many researchers, as Zn2 excimer holds promise because of its long lifetime and its potential as an energy-storage system. However, excimer’s benefits are based on excitation of the outermost electron. Our study confirmed the quantum dynamical condensation processes in which inner-core excitation arises due to ion-recombination between the vapor phase and the solid phase. The X-ray diffraction of the condensed structure of zinc fi...

1. Liquid aerosols: Colloid with liquid dispersed phase and a gas dispersing medium 2. Solid Aerosol: The colloids prepared by the dispersed phase are solid with the dispersing medium being gaseous 3. Electron Affinity: Energy that is liberated by an atom to receive electrons 4. Aufbau Rules : This rule states that the electrons in an atom will fill the orbital with the lowest energy proceeded to a higher orbital 5. Hund Rules : This rule states that electrons in filling orbital do not form pairs first 6. Pauli Rules : This rule states that two electrons in an atom may not have the same four quantum numbers 7. Autocatalyst : The catalyst is formed by itself in a reaction 8. Bases : Substances that have specific properties, such as slippery when the skin and feel bitter  and can change the paper litmus blue to red 9. A Molecular : Coupling Base that receives protons and acts as a base 10. Battery : Dry cell which is one of the non-recharge...

         Chemistry is the science of dealing with the compounds, elements, and molecular structure of matter. Essentially, chemistry is the science of examining substances and objects to find out what they're made of and how the react to different conditions.         A  cause-effect relationship   is a relationship in which one event (the cause) makes another event happen (the effect). One cause can have several effects. For example, let's say you were conducting an experiment using regular high school students with no athletic ability. The purpose of our experiment is to see if becoming an all-star athlete would increase their attractiveness and popularity ratings among other high school students.        Suppose that your results showed that not only did the students view the all-star athletes as more attractive and popular, but the self-confidence of the athletes also improved. The key princi...