Forces that hold atoms together.

a.Valence electrons
b.Ion
c.Law of Conservation of Matter
d.Chemical bonds
e.Reactants
f.Electronegativity
g.Chemical reaction
h.Balanced chemical equation
i.Groups
j.Products
k.Coefficient
l.Periods
m.Chemical formula
n.Polyatomic ionatoms together.

The correct choices are:

a. Valence electrons
d. Chemical bonds
f. Electronegativity
m. Chemical formula
n. Polyatomic ion