(A) BH 3
(B) H 2 O
(C) CH 4
(D) NH 3
(E) AlCl 335 . The field of organic chemistry focuses mainly on
(A) oxygen-containing compounds
(B) carbon-containing compounds
(C) proteins and enzymes
(D) carbohydrates
(E) nitrogen-containing compounds36 . Which of the following is the most electronegative element?
(A) He
(B) I
(C) N
(D) O
(E) C37 . Which of the following has the greatest affinity for electrons?
(A) Na
(B) Cl
(C) Br
(D) K
(E) C38 . What would be the approximate weight of 1.204 × 1024 bromine atoms?