Atoms and bonds ionic and convalent

Biology
Tutor: None Selected Time limit: 1 Day

explain the relationship among atoms, elements, and compounds

explain the propertie of cohensions and adhension. Give an example of each property

what is the relationship among solution, solutes, and solvents 

how are acids and bases different? how do their ph valu differ

identity three major part of proteins

what is a chemical reactions

describe the two type of energy changes that can occur in a chemical reaction 

what relationship exists between an enzymes and a catalyst

Jun 2nd, 2015

Atoms are the smallest particle of matter. Each has a nucleus of protons and neutrons surrounded by electrons.
An element is an atom with a particular atomic number, that is, a certain number of protons. Each element has a different number of protons.
A compound is something formed by two or more atoms. 

Adhesion is the tendency of a substance to stick (or adhere) to a different (an unlike) substance. An example of adhesion is the tendency of a Band-aid to stick to your skin.
Cohesion is the tendency of a substance to stick to itself. An example of cohesion is the tendency of water to bead on a waxy surface. The water molecules tend to stick to themselves as opposed to other substances.

An aqueous solution contains one or more chemicals (or solutes) dissolved in water (the solvent). The most common way to describe the concentration of a solute in an aqueous solution is to use a unit of measurement called molarity.

Acids donate protons while bases accept protons. Therefore an acid-base reaction involves the giving and receiving of protons for neutralisation. Acids have a pH of below 7, and bases have a pH of above 7 to 14.
a pH of 7, however, is considered neutral. that is, neither acidic nor basic.

A chemical reaction is a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Chemical reactions often involve changes in energy due to the breaking and formation of bonds. Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.

An enzyme is a biological term for a catalyst. Both speed up various reactions. All enzymes are catalysts, whereas not all catalysts are necessarily enzymes. Kinda like how all squares are quadrilaterals, whereas not all quadrilaterals are squares.

Jun 2nd, 2015

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Jun 2nd, 2015
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