Question

An element has its electronic configuration as 2, 8, 4. Now answer the following question.: a) What is the atomic number of this element? ​

Answer 1

Answer:

The atomic number of this element is 12.

electronic confriguation :2, 8,2

Electronic configuration - 2,8,2

Total number of electrons = 2+8+2=12

Since atom is neutral

No. of electron = no. of protons

Atomic number of an element is equal to total number of protons in it.

∴ Atomic number = 12

Answer 2

Answer:

Atomic number of the element is 14.

Explanation:

The atomic number of the element is 14 because the number of electrons present in an element must be equal to the number of protons and the number of protons of an element is called its atomic number.

The name of the element is silicon (Si) having atomic number 14.