The ratio of number of electrons present I four shells of an element is `1 : 4 : 4 : 1`, fourth shell is the valence shell . Then mass of total positive charge present in the atom is ____________ times to that of mass of electron

Options

A. 36 , 704
B. 27 , 555
C. 18 , 370
D. 55, 110

Answer

1

Explanation

The electronic configuration of the element is
`{:(K,L,M,N),(2,8,8,2):}`
Therefore the atomic number is 20 . We know that mass of proton is 1837 times that of electron, therefore total positive charge present is `20x1837 =36740`,