Question

X is an element with atomic number 20 what will the formula of it chloride

Answer 1

Xcl2

=Cacl2

An element with atomic number 20 is Calcium.

i) Calcium is a metal.

ii) Calcium is more reactive than Magnesium.

As in case of alkali metals and alkaline earth metals reactivity increases with increase in atomic number.

iii) Valency of Calcium is 2.

Electronic confugaration: (2,8,8,2)

Answer 2

Answer:

cacl2

Explanation:

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