Question

Two atoms are said to be isobars if. *

(a) they have same atomic number but different mass number.

(b) they have same number of electrons but different number of neutrons

(c) they have same number of neutrons but different number of electrons.

(d) sum of the number of protons and neutrons is same but the number of protons is different.

​

Answer 1

Answer:

d

Explanation:

Isobars are elements that have the same number of nucleons (sum of protons and neutrons).The series of elements with 40 Mass numbers serve as a good

atomic number is equal to number of proton

mass number is sum of number of proton and electron

example;

mass no. atomic no. atom

40 16 S,

40 17 Cl,

40 18 Ar,

40 19 K,

40 20 Ca.

The nucleus of all the above-mentioned elements contain the same number of particles in the nucleus but contain varying numbers of protons and neutrons.