Electronic configuration of "X" atom is 2,8,7. State the following Valency, valence electrons, atomic number, nature
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Electronic configuration
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Electronic configuration
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The element is Chlorine(Cl)
Since
Chlorine needs only one electron so as to attain stable electronic configuration of the nearest noble gas (i.e. Argon)
Therefore the valency of chlorine is -1
The number of valence electrons is 7
The atomic number is 17
Chlorine is a greenish yellow gas at room temperature and atmospheric pressure. It is two and a half times heavier than air.
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