Chemistry, asked by johnkhualngaihte, 1 month ago

Na, Mg, Al belong to third period of the modern periodic table .

why?​

Answers

Answered by arnavlaxmi1116
1

Explanation:

According to the group number, the number of valence electrons in sodium is one, magnesium is two and aluminium is three. So, aluminium has the highest number of valence electrons, so aluminium can show the valency + 3.

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