Electronic configuration of the same elements is given. Write answers to the following questions. i. [Ne]3s2 ii. [Ar]3d2,4s2 iii. [Xe]6s2 iv. [Ne]3s2,3p2 Which metal is having high reactivity?
Open in App
Solution
[Xe]6s1
i. [Ne]3s2→12Mg
ii. [Ar]3d2,4s2→22Ti
iii. [Xe]6s2→56Ba
iv. [Ne]3s2,3p2→14Si
In metals, greater the tendency to lose electrons, the greater is the reactivity.
The reactivity in metals increases on going down the group,
In non-metals, greater the tendency to gain electrons, the greater is the reactivity.
The chemical reactivity of non-metals decreases on going down the group as it depends on the tendency to gain electrons.
Across a period
On moving from left to right in a period, the chemical reactivity of elements first decreases and then increases.
thus, among all [Xe]6s2→56Ba has the highest reactivity.