Q 4 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.
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Isobars: Isobars are atoms of different elements having different atomic number but the same mass number. Isobars have different number of protons in the nucleus but the total number of nucleons (protons + neutrons) in them is the same
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