Question

an element has atomic number 13 and atomic mass of 27 how many electrons are there in each atom of the element and how are these electrons distributed various energy levels

Answer 1

Atomic number =13
mass number =27

since it is a neutral atom
therefore
number of protons = number of electrons=13

hence there will be 13 electrons.

its electronic configuration will be

2,8,3

or

1s2, 2s2,2p6,3s2,3p1.


hope it helps you

Answer 2

These electrons are arranged according to the capacity of the shell ..and no. Of shells are decided on the basis of valence electrons

Hence, the atomic no. Is 13 so its electronic configuration is 2,8,3 therefore there will be 3 shells and the last shell will contain 3 electrons ..

Hope it helps you ..