Question

Metal A has eloctronic configuration 2,8,1 and metal B has electronic configuration 2,8,8,2 out of these which metal is more reactive write the reaction with this metal with dilute HCl acid.

Answer 1

B i.e,calcium is more reactive then A,i.e, sodium becoz reactivity increase with increase of size.

Ca+2HCl=CaCl2+H2

Answer 2

Sodium (Na) is more reactive than Calcium (Ca)

Where, 2,8,1 is Na &

2,8,8,2 is Ca.

This is according to reactivity series..

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