Question

Which of the given element A B C D and E having atomic number 2,3,7,10 and 12 . Will have similar chemical properties

Answer 1

Answer:

I think it may be He and Ne with atomic number 2 and 10 because they lie in the same group.

Answer 2

Elements A and D belong to same group and have similar chemical properties.

Explanation:

The chemical reactivity of elements is governed by the valence electrons present in the element.

The elements present in the same group or vertical column have similar valence configurations and thus behave similar chemical properties or have similar bonding properties.

$A:He:2:1s^2$

$B:Li:3:1s^22s^1$

$C:N:7:1s^22s^22p^3$

$D:Ne:10:1s^22s^22p^6$

$E:Mg:12:1s^22s^22p^63s^2$

As He and Ne have similar valence configurations, they belong to same group and have similar chemical properties.

Learn more about groups in periodic table

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