Answer
a. O can form 2 covalent bonds.
b. Al can bond 3 covalent bonds.
c. Br can bond 1 covalent bond.
d. Si can bond 4 covalent bonds.
Work Step by Step
Atoms with valency of one, two, three, or four form one two three or four covalent bonds in neutral molecules.
Oxygen is located in group 6A.
number of bonds: 2
Aluminum is located in group 3A.
Number of bonds: 3
Bromine is located in group 7A.
Number of bonds: 1
Silicon is located in group 4A.
Number of bonds: 4