Mass of total positive charge present in an atom is 55110 times to that of mass of electron . Write the electronic configuration of the element.

Options

A. 2, 8, 9, 2
B. 2, 8, 18, 1
C. 2, 8, 18,2
D. 2, 8, 8,2

Answer

c

Explanation

We know that mass of a proton is 1837 times that of an electron.
`:.` Atomic number of the element ` = 55110/1837 = 30`
`:.` Electronic configuration of the element is 2, 8, 18 and 2