Final extra credit

mass of a neutron

One

Why does an atom become an ion

it gains or loses one or more electrons, resulting in a net electrical charge.

meaning of covalent

sharaing pairs of electrons from metal to non metal

what are valence electrons

electrons en the outer most energy level

when do you use prefixes

in covalent bonds, nonmetal and nonmetal

when do you use roman numerals

with transition metals with more then one charge

what is used to valence equations

the coefficients

how do you know the chemical reactions is combustion

the products are H2O and CO2

what is Avogadros number

6.022 x 10²³

how to find the atomic charge

subtract the number of protons from the electrons

what does the subscript tell you

how much of each element there is

when going from moles to mass/mass to moles, what do you use.

molar mass

a mole is

a small amount of something

what is stoichiometry

applying math to formulas and equations (using mole map)

Law of conservation of mass

mass is neither created or detroyed

where is the electron found

the electron cloud

what is an anion

meaning of soluble

dissolved in water

what three products could be produced to make a double replacement reaction occur.

Gas, Water, Precipte

what is the empirical formula

lowest whole number ratio of atoms in a compound