Question

Give scientific reasons.

Lithium and Sodium are included in same group in modern periodic table.


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Answer 1

Answer:

Lithium, sodium and potassium have same number of valence electron i.e. 1, hence they belong to same group.

Explanation:

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Answer 2

Explanation:

1.the valence electrons in Lithium and Sodium are same.

2.the atom in last shell is same.

3.the elements belonging to same group have same valency.

hence, Lithium and Sodium are included in same group in modern periodic table.