H
2. Reactive nonmetal
He
2. Noble gas
Li
2. Alkali metal
Be
2. Alkaline earth metal
B
2. Metalloid
C
2. Reactive nonmetal
N
2. Reactive nonmetal
O
2. Reactive nonmetal
F
2. Reactive nonmetal; halogen
Ne
2. Noble gas
Na
2. Alkali metal
Mg
2. Alkaline earth metal
Al
2. Metal
Si
2. Metalloid
P
2. Reactive nonmetal
S
2. Reactive nonmetal
Cl
2. Reactive nonmetal; halogen
Ar
2. Noble gas
K
2. Alkali metal
Ca
2. Alkaline earth metal
Sc
2. Transition metal
Ti
2. Transition metal
V
2. Transition metal
Cr
2. Transition metal