Notes of metals and non-metals in easy language
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Metals
Metals are those elements which have 1,2 or 3 valence electrons in their valence shell.
Example : atomic no. of Na =11
Electronic confugration =2,8,1
They always loose electrons to form electropositive ions.
Na – 1electron ——Na +
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Non Metals
Non metals are those elements which have 4,5,6 or 7 valence electrons in their valence shell and they always gain electrons to form electronegative ions.
Cl(17) – 1 electron ——–Cl-
Electronic Configuration = 2,8,7
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