Questions 11–14
Questions 15–18
(A) CH 4
(B) CO 2
(C) NH 3
(D) N 2
(E) O 2
11 . A major greenhouse gas implicated in global warming
12 . Forms hydrogen bonds
13 . Is polar
14 . Has a triple bond
(A) C
(B) N
(C) O
(D) F
(E) Ne
15 . Exists as individual gas-phase atoms under standard conditions
16 . Exists as a network covalent solid in its most common form