q2 ME If the mass of electrons is denoted by E neutrons by N

If the mass of electrons is denoted by E, neutrons by N and protons by 2, then the atomic number of an electrically neutral atom is equal to the sum of E + N N + Z E + Z + N E + Z

Solution

it should be atomic mass number .

atomic mass no of a neutral atom = no of proton + no of neutron = N + Z.

or

atomic mass no of a neutral atom = no of electron + no of neutron = E+ N.

options (a) , (b) are crrect.