Question

elements A,B,C,D have atomic numbers 17,8,10,11 respectively.
Which is a noble?
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Answer 1

Answer:

element c is noble

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Answer 2

Answer:

Element C is noble.

It is because the electronic configuration of element C is 2,8

This means elements C completes its Octet in its valenced shell.

Hence, it can be regarded as noble gas because it has no need to gain or lose electrons to be stable. It is a stable element in itself.

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