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Question

Which of the following electrons control the properties of elements?

A
Inner electrons
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B
Outer electrons
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C
Electrons present in the shell next to the nuclues
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D
None
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Solution

The correct option is B Outer electrons
Since, the electrons present in the inner shells do not take part in chemical reaction, it must be the electrons in the outer most shell which control the properties of the atoms. Thus, if the arrangement of electrons in the outer shell or valence shell are same, the properties will also be similar. Hence option B is correct.

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