Question

(i)If ‘K’ and ‘L’ shells of an atom are completely filled with electrons, then:
(a) What will be the total number of electrons in the atom?
(b) Identify the element.
(ii) What is the valency exhibited by magnesium?

Answer 1

Answer:

Herw is your answers mate.

Explanation:

A) 10 will be the total number of electrons in the atom. Because K shell has the capacity to store 2 atoms and L shell has the capacity to store 8 atoms. So 2+8=10

(B) The element will be Neon as the atomic number 10 is Neon.

(ii) The valency exhibitted by magnesium is 2 as its atomic number is 12

Answer 2

Answer:

ans b

Explanation:

there are two properties that can be used to identify an element: the atomic number or the number of protons in an atom