Allotropes
Isomers
Isotopes
Isotones
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Discussions (7)
the correct option is C being isotope because it has variable mass number
but the same atomic number
the answer is Isotopes cuz Isotopes are atom of the same element having the same number of proton i.e atomic number but different mass number i.e. Number of neutron
Here is an explanation:
the correct option is (C) Isotopes and this is because from the main definition we can referred to isotopy as the phenomenum in which an element exist with the same atomic number but different mass number. Therefore the elements exhibiting the pre-defined properties are called isotopes.
REF: new school chemistry
Because the elements posses the same number of protons but different mass number
