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Consider the following statements:
$I$. All isotopes of an element have the same number of neutrons.
$II$. Only one isotope of an element can be stable and non-radioactive.
$III$. All elements have isotopes.
$IV$. All isotopes of carbon can form chemical compounds with oxygen-$16$.
Choose the correct option regarding an isotope.
Statements $III$ and $IV$ are correct
Statements $II, III$ and $IV$ are correct
Statements $I, II$ and $III$ are correct
Statements $I, III$ and $IV$ are correct
Solution
(a)
Isotopes have same number of protons. All isotopes of few elements are stable and non-radioactive. Also, all isotopes of few elements are unstable and radioactive. All elements have isotopes.
All isotopes of carbon can form compounds with oxygen.
So, only statements $III$ and $IV$ are correct.
