(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.