a) : 0 nodes perpendicular to the internuclear axis, which implies a bonding orbital; 2 nodes parallel to the internuclear axis, which implies a orbital.

b) : 0 nodes perpendicular to the internuclear axis, which implies a bonding orbital; 0 nodes parallel to the internuclear axis, which implies a orbital.

;

c) *: 1 node perpendicular to the internuclear axis, which implies an antibonding orbital; 1 node parallel to the internuclear axis, which implies a orbital.

d) *: 1 node perpendicular to the internuclear axis, which implies an antibonding orbital; 0 nodes parallel to the internuclear axis, which implies a orbital.