Question

calculate the number of elements, protons and neutrons in am atom of an element with atomic number 20 and mass number 40. write the electronic configuration and draw the structure of the atom

Answer 1

The number of electrons in an atom is the same as its number of protons.
Since the atomic number is equal to the number of protons.
     no of protons = no of electron = 20
electronic configuration = (2,8,8,2)

Answer 2

Answer:

number of protons =20

number of electron =20