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Molecules

Elements belo...

Question

Elements belonging to the same group of periodic table have :

A

same number of energy levels

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B

same number of valence electrons

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C

same number of electrons

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D

same ionisation enthalpy

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Solution

The correct option is A same number of valence electrons
Elements belonging to the same group of the periodic table have the same valence shell electronic configuration thus have the same number of valence electrons.
option B

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Q. In modern periodic table, if two elements have the same number of valence electrons, then they belong to the same :

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