An element m' has atomic number 12. (i) write its electronic configuration and valency. (ii) is m' a metal or a non-metal ? Give reason in support of your answer. (iii) write the formula and nature (acidic / basic) of the oxide of m.
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Atomic number 12 => configuration= 2,8,2
Valency is therefore equal to 2+ because element needs to lose 2 electrons to gain stable electronic configuration.
m' is a metal because all metals have positive valencies.
The formula of the oxide will be m'O by simple valency interchange, and it will be basic in nature because bases are defined as oxides and hydroxides of metals and m' is a metal.
It's quite simple really....
Hope this helped!
;)
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