Question

which of the following are true for an elements ? (i) atomic no. =no.of protons +no.of electrons (ii) mass no=no. of protons + no. of neutrons , (iii) atimic mass=no.of protons =no.of neutrons(iv) atimic no. =no.of protons =no.of electrons​

Answer 1

Answer:

(ii) and (iv) is correct