In the periodic table, generally which of the following similarity is found in elements of the same group?

Atomic number

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Number of electrons in outermost orbit of an atom

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Number of isotopes

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Atomic volume

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Solution

The correct option is B Number of electrons in outermost orbit of an atom
Elements belonging to the same group of the periodic table shows same valency i.e., similar valence shell electronic configuration. Hence, number of electrons in outermost orbit of an atom represents group in periodic table. Hence, option B is the correct answer.

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