Question

1. An element Y has its first 2 shells completely filled and the 3rd shell has same number of electrons as in the first shell.
a) Identify the element Y and state its atomic number.
b) Draw the Bohr atomic model of Y.

Answer 1

Answer:

Electronic Configuration: 2,8,2.

Element: Magnesium

Atomic number: 12

HOPE THIS BRING A SMILE IN YOUR FACE

Explanation:

Answer 2

Answer:

Magnesium

Explanation:

Magnesium atomic number is 12. It contains 2 electrons in the first shell, 8 electrons in the second shell and 2 electrons in the third shell which is the same number of electrons as the first shell.

Bohr model  2,8,2