Pick an element from the list below that fits each description. Each element is used only once.
(a) an alkali metal
(b) a chalcogen
(c) a pnictogen
(d) a halogen
(e) a metalloid in group 15
(f) a noble gas
Elements: P, Cs, I, S, Kr, As

• A. (a) Kr
  (b) P
  (c) S
  (d) I
  (e) As
  (f) Cs
• B. (a) Cs
  (b) P
  (c) S
  (d) As
  (e) Kr
  (f) I
• C. (a) S
  (b) Kr
  (c) I
  (d) P
  (e) Cs
  (f) As
• D. (a) Cs
  (b) S
  (c) P
  (d) I
  (e) As
  (f) Kr

Answer: (D)