Question

with increase in atomic number in a period of a periodic table
a. electron affinity decreases
b. metallic character decreases
c. ionization energy decreases
d. atomic mass decreases

Answer 1

Option b is correct.
As atomic number increases elements are from left to right. Nonmetals are located at the right side of the periodic table.
Elements change from electro-positive to electro-negative from left to right in a period.
So the metallic character decreases.

Answer 2

Option b is correct since increase in atomic no. causes increase in nuclear charge thus metallic character decreases