THE ATOM OF AN ELEMENT X HAS 7 ELECTRON IN ITS M SHELL IS A MATEL OR NON-METAL AND WHY

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Solution

An element having 7 electrons in its outermost shell gains one electron to form stable configuration having its valency of -1. Hence the element should be non-metal and not metal.

If the no. of valence electrons 1 to 3 then it would be metal and if the no. of valence electrons inbetween14 to 7 then they are non-metals.

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