Which of the following metal is highest electropositive (metallic) in nature?

Options

A. Be
B. Rb
C. Mn
D. Tl

Answer

B

Explanation

Rubidium is most electropositive in nature.
(a) `Cr:4s^(1)3d^(5)" ` (each d-orbital has `1e^(-)`)
(b) `Fe^(3+):4s^(0)3d^(5)` (each d-orbital has `1e^(-)`)
(c) `Cu^(+):4s^(0)3d^(10)` (each d-orbital has `2e^(-)`)