Beginning Chemistry

electrons

negativly charged

protons

positively charged

neutrons

no charge

protons+neutron=

atomic mass

# of protons=

atomic number

Polyatomic ion

group of atoms that act like a single atom

ammonium

NH4 1+

acctate

C2H3O2 1-

chlorite

CIO2 1-

chlorate

CIO3 1-

perchlorate

CIO4 1-

hydrogen carbonate

HCO3 1-

hydroxide

OH 1-

nitrate

NO3 1-

nitrite

NO2 1-

carbonate

CO3 2-

sulfate

SO4 2-

sulfite

SO3 2-

phosphate

PO4 3-

chromate

CrO4 2-

dichromate

Cr2O7 2-

permanganate

MnO4 1-

cyanide

CN 1-