GEN CHEM 1: EXAM I

Chemistry

the study of matter

matter

the stuff that makes up material things

mass

the measure of the quantity of matter (grams)

physical change

a process in which the chemical identity of the materials involved do not change

chemical change

a process in which the chemical identity of the materials involved change

law of conservation of mass

Matter is neither created nor destroyed

element

Atom

a basic unit of matter

chemical compound

pure substance

mixture

substances that can be separated further by physical changes

homogenous mixture

a mixture in which the components are completely mixed down to the level of molecules and ions

heterogeneous mixture

a mixture in which the components are not completely mixed down to the level of molecules and ions

Celcius

K-273.15

Farenheit

9/5C+32

True or False: 1cm^3= 1mL

true

volume of a circle

4/3πr³

What does x symbolize?

elemental symbol

What does Z symbolize?

atomic mass

What does A symbolize?

atomic number

Isotopes

Atoms with the same number of protons but different numbers of neutrons

atomic weight

Average mass of a particular atom

ion

A charged atom

cation

A positively charged ion

anion

A negatively charged ion

Carbonate

CO3 2-

Sulfite

SO3 2-

Sulfate

SO4 2-

Phosphate

PO4 3-

dihydrogen phosphate

H2PO4-

Cyanide

CN-

Nitrate

NO3-

Hydroxide

OH-

Permanganate

MnO4-

Chlorate

ClO3-

Hypochlorite

ClO-

Hydrogen Carbonate

HCO3-

Hydrogen Sulfite (bisulfite)

HSO3-

Hydrogen Sulfate (bisulfate)

HSO4-

Hydrogen Phosphate

HPO4 2-

Chromate

CrO4 2-

Acetate

C2H3O2-

Nitrite

NO2-

Dichromate

Cr2O7 2-

Perchlorate

ClO4-

Chlorite

ClO2-

Ammonium

NH4+