(a) How does electropositivity of elements gets affected as we move:
(i) down a group (ii) across a period ?
(b) Which atomic property increases both as we move across a period or down a group ?
(a) (i) Electropositive character increases down a group due to decrease in the effective nuclear charge.
(ii) Electropositive character decreases across a period due to increase in the effective nuclear charge.
(b) Atomic number/Atomic mass.