Question

In molecular formula of AlCl 3 . Write the valency if aluminum and chlorine

Answer 1

AL HAS VALANCY 3 AND CL HAS VALANCY 1

Answer 2

Aluminium (Al) having 3+ as valency as atomic number of aluminum is 13 and we know that outermost shells need 8 electrons to be stable... so electronic configuration of aluminum will be 2,8,3. So, to be stable aluminum will lose 3 electron... and when any element loses the electrons then it will be positively charge. similarly, chlorine having 1- as its atomic number is 17 and it's electronic configuration is 2,8,7 ...so to be stable it needs 1 more electron. and we know that when any elements gain any electron and it will be negatively charge...
when Aluminum combines with chlorine. then it makes formula AlCl3...
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