Which statement is correct about the isotopes of an element?
They have more protons than neutrons.
They have the same electron arrangement.
They have the same mass number.
They have the same numbers of protons and neutrons.
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Answer: option b same electronic arrangement
Explanation: isotopes have same no of protons and electrons differing in no of neutrons. Since these contain same no of Valance electrons therefore isotopes of an element has identical electronic configuration.
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