Answer
a. is Beryllium (Be)
b. is Antimony (Sb)
c. is Krypton (Kr)
d. is Iodine (I)
e. is Germanium (Ge)
Work Step by Step
study the periodic table (groups and periods) at page 105 ( 4.2 The Periodic Table)
the vertical columns are the groups/family of elements with similar properties
the periods are the horizontal lines, counted from 1 to 7. ( ex: Beryllium is an alkaline earth metal in period 2)