Question

The atomic number of an element is 12. (a) Write its electronic configuration and determine its valency.
(b) Is it more reactive or less reactive than Ca (atomic number 20)? Justify your answer giving reason.
(c) Is it a metal or a non-metal?

Answer 1

the element is magnesium its electronic configuration is (2,8,2) and its valency is 2 .it is a metal

Answer 2

Its EC is 2,8,2 and its valency is 6 and valence electron in 2. Ca is more reactive than this element (magnesium). This is because since Ca has larger nucleus, its electro positivoty is high so itsmore reactive than magnesium (Mg). Yes......Mg is a metal ofcourse.....

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