1) Which atom(s) could be the central atom, X, in the stable molecule XH3 with one lone pair of electrons?
(a) B
(b) C
(c) N
(d) P
(e) S
2) Which atom(s) could be the central atom, X, in the stable molecule XF2 with two lone pairs of electrons?
(a) Cl
(b) O
(c) Se
(d) Si
(e) Xe
3) Which atom(s) could be the central atom, X, in the stable molecule XO3 with no lone pairs?
(a) Al
(b) C
(c) Cl
(d) P
(e) S
4) Which atom(s) could be the central atom, X, in the stable molecule XF4 with one lone pair of electrons?
(a) C
(b) I
(c) N
(d) S
(e) Xe
5) Which atom(s) could be the central atom, X, in the stable molecule XCl5 with no lone pairs?
(a) As
(b) Br
(c) C
(d) P
(e) Xe
6) Which atom(s) could be the central atom, X, in the stable molecule XCl4 with no lone pairs?
(a) B
(b) Br
(c) C
(d) Te
(e) Xe
7) Which atom(s) could be the central atom, X, in the stable molecule XF3 with two lone pairs?
(a) B
(b) Br
(c) Cl
(d) N
(e) P
8) Which atom(s) could be the central atom, X, in the stable molecule XH2 with two lone pairs?
(a) Si
(b) C
(c) N
(d) S
(e) O