AlCl.

ClAl.

AlCl₃.

Al₃Cl.

KO.

K₂O.

K₂O₂.

KO₂.

in the innermost energy level of an atom

in the outermost energy levels of an atom

in the middle energy levels of an atom

True

False

By donating and receiving valence electrons between atoms.

Opposite slight charges attract each atom in the compound.

Scientists still aren't sure.

Sharing valence electrons between atoms.

2 Nonmetals

2 Metals

1 Metal and 1 Nonmetal

2 Noble Gases

Single Bonds

Double Bonds

Triple Bonds

Quadruple Bonds

positive ion

negative ion

neutral ion

neutral atom

so the number of protons equals the number of electrons

so an atom can become unstable

to fill the outermost energy level