Question

core. 40% Resources 13 of 15 > Group the elements into pairs that would most likely exhibit similar chemical properties. It does not matter which pair of elements is pair 1. pair 2, or pair 3. so long as the correct elements are paired Pair 1 Pair 2 Pair 3 Answer Bank Mg contact us about us privacy policy o e e

Answer 1

The elements which are belong to the same group, they represent same physical and chemical properties.

This is because, these properties depend upon the number of outer valence electrons of the group.

Because the elements of the same group have similar outer valence shell electronic configuration, hence the elements of the same group represents similar physical and chemical properties.

Hence, the pair of electrons which represents similar chemical properties:

Pair (1) = Mg & Sr because both the elements belong to the group 2 which has outer valence shell electronic configuration ns^2.

Pair (2) = O and Se because both the elements belong to group 16 & have outer valence shell electronic configuration ns^2 np^4.

Pair (3) = F and Br because both the elements belong to the group 17 & have outer valence shell electronic configuration ns^2 np^5.