Question

Hydrogen,berilium, sodium, magnesium.
1)write the pair of elements having same properties.
2)state the group no of each pair.
3)name one other element belonging to each of these group

Answer 1

1) sodium and magnesium
According to the modern periodic law, properties of elements are periodic function of their properties.
As Mg is placed right after Na, they have similar properties.

2) hydrogen - group 1 (alkali metals)
Berillium - group 2 (alkaline earths)
Sodium - group 1
Magnesium - group 2

3) group 1 - lithium
Group 2 - potassium

Hope this helps

Answer 2

Answer:

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