Term | Definition |
Chemistry | The study of matter and the changes matter undergoes |
Atoms | Fundamental building blocks of matter |
Molecules | Specific geometrical arrangements of atoms |
Law | A general statement of past observations |
Theory | A possible explanation to a law |
Matter | There are 3 phases...
1. Solid..
2. Liquid..
3. Gas |
Solid | Have definitive shape and volume |
Liquid | Indefinite shape, definite volume |
Gas | Indefinitive shape and volume. Gases are compressible |
Two Types of Matter | 1. Pure Substance...
A. Element..
B. Compound..
2. Mixture...
A. Homogeous..
B. Heterogenous |
Element | A substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same atomic number, that is, each atom has the same number of protons in its nucleus as all other atoms of that element. |
Compound | A substance formed when two or more chemical elements are chemically bonded together. Two types of chemical bonds common in compounds are covalent bonds and ionic bonds |
Homogeneous Mixture | A term in physical chemistry and material science that refers to substances and mixtures which are in a single phase. All homogenous mixtures are solutions |
Heterogenous Mixture | Any combination of substances that does not have uniform composition and properties; a mixture of physically distinct substances with different properties |
H | Hydrogen |
He | Helium |
Li | Lithium |
Be | Beryllium |
B | Boron |
C | Carbon |
N | Nitrogen |
O | Oxygen |
F | Fluorine |
Ne | Neon |
Na | Sodium |
Mg | Magnesium |
Al | Aluminum |
Si | Silicon |
P | Phosphorus |
S | Sulfur |
Cl | Chlorine |
Ar | Argon |
K | Potassium |
Ca | Calcium |
Sc | Scandium |
Ti | Titanium |
V | Vanadium |
Cr | Chromium |
Mn | Manganese |
Fe | Iron |
Co | Cobalt |
Ni | Nickel |
Cu | Copper |
Zn | Zinc |
Ga | Gallium |
Ge | Germanium |
As | Arsenic |
Se | Selenium |
Br | Bromine |
Kr | Krypton |
Rb | Rubidium |
Cs | Caesium |
Fr | Francium |
Sr | Strontium |
Ba | Barium |
Ra | Radium |
I | Iodine |
At | Astatine |
Uus | Ununseptium |
Xe | Xenon |
Rn | Radon |
Uuo | Ununoctium |
Pt | Platinum |
Hg | Mercury |
Au | Gold |
Ag | Silver |
Sn | Tin |
Pb | Lead |
W | Tungsten |
U | Uranium |
Bi | Bismuth |
Sb | Antimony |
Separation Tequniques | 1. Decanting..
2. Filtration..
3. Distiliation |
Decanting | To carefully pour off a liquid |
Filtration | Separation through a physical boundary |
Distillation | Separation based on boiling point difference |
Volatile | Easily vaporizable |
Properties and Changes | 1. Physical Change..
2. Chemical Change |
Physical Change | Does not change in composition |
Chemical Change | Changes in composition |
Temperature | *F(212 <-180-> 32)
*C(100 <-100-> 0)
K(373 <-100-> 273) |
Conversion Equations Between Temperatures | K=*C+273.15
*F=9/5*C+32
or
*F=1.8*C+32 |
Terra | T = 1,000,000,000,000 = 10^12 |
Giga | G = 1,000,000,000 = 10^9 |
Mega | M = 1,000,000 = 10^6 |
Kilo | k = 1,000 = 10^3 |
Hecto | h = 100 = 10^2 |
Deca | da = 10 = 10^1 |
Deci | d = 0.1 = 10^-1 |
Centi | c = 0.01 = 10^-2 |
Milli | m = 0.001 = 10^-3 |
Micro | |U = 0.000001 = 10^-6 |
Nano | n = 0.000000001 = 10^-9 |
Pico | p = 0.000000000001 = 10^-12 |
Derived Unit | Any of the various units of measurement that are derived from the basic units in the International System. Ex: volume, density |
Volume | Vcube = L*W*H |
Density | D = M/V...
Density has intensive(intrinsic) property |
Intensive(Intrinsic) Property | Independent of amount |
Extensive(Extrinsic) Property | Dependent of amount |
Exact Numbers | Number that have no uncertainty and thus do not limit the number of significant figures in any calculation |
Basic Metric Units | 1. Length
2. Mass
3. Time
4. Temperature
5. Amount |
Length | Meter(m) |
Mass | Kilogram(k) |
Time | Seconds(s) |
Temperature | Kelvin(K) |
Amount | Mole(mol) |