Question

Which of the following elements will have the lowest first ionisation
10.
energy?
(1) Mg
(3) Li
(2) Rb
(4) Ca​

Answer 1

Answer:

(2) Rb

Explanation:

alkali metals have the lowest first ionisation energy. because they gain stable configuration after the removal of one electron outermost shell.

Answer 2

Answer:

2 number is the answer of this question