Question

Calculate the proton electron neuton in an atom of an element with atomic number 20 and mass number 40 write the electronic confriguration and draw the strcture of the atom

Answer 1

atomic no.(Z) = no of electrons or protons.

mass no. (A) =no. of protons + neutrons

Z = 20 =ELECTRONS =PROTONS

A =NEUTRONS + PROTONS

40 = neutrons+ 20

40 - 20 = neutrons

: 20

NO OF ELECTRONS = PROTONS= NEUTRONS = 20

ELECTRONIC CONFIGURATION = 2 , 8 ,8 2

STRUCTURE OF ATOM IN THE PICTURE .