Lewis Structure Rules

Question 1

H and F only form

Answer 1

one single bond, always occupy terminal position

ALWAYS monovalent

Question 2

Cl, Br, and I usually form

Answer 2

single bonds

usually monovalent

Question 3

S and O form

Answer 3

single or double bonds 
usually divalent (forming 2 single bonds or one double bond)

Question 4

N forms

Answer 4

single, double, and triple bonds

Question 5

C forms

Answer 5

single, double, and triple bonds

usually does not occupy a terminal position

Question 6

Central atom is usually

Answer 6

the least electronegative