Malayalam and X belongs to group 17 and third period of periodic table for schools and write the configuration of the element what is its valency predict the next what is metal or nonmetal give the formula of compound formed when combines with a element Y having valency 3
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the element is chlorine it's electronic configuration is 1s2 2s2 2p2 3s2 3px2 3py2 3pz1.it is a non metal
when it is combine with a element with valency 3 is. YX3
example: AlCl3
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