Q.

Atoms having the same number of protons but different number of neutrons are called :

A. Isotopes
B. Cations
C. Higgs-boson
D. Anions .
Answer» A. Isotopes
Explanation: Atoms that have the same number of protons but different numbers of neutrons are called isotopes. For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively. The atomic number of carbon is 6, which means that every carbon atom has 6 protons, so that the neutron numbers of these isotopes are 6, 7 and 8 respectively.
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