Answer
See the answer below.
Work Step by Step
A: Group 2, Period 5
B: Group 17, Period 5
a) It's a metal, alkaline earth
b) B: ionization energy grows from left to right in the periodic table.
c) A, atomic radius grows from right to left in the periodic table.
d) B, the negative of the electron attachment energy grows from left to right in the periodic table.
e) A, because it only has to lose two electrons to achieve a noble gas configuration.
f) B has to gain one electron to achieve a noble gas configuration so:
$AB_2$
