Q. 104.3( 12 Votes )

Na, Mg, and Al ar

Answer :

Al has the highest valency as it has 3 valence electrons. Its atomic number is 13[2,8,3].

Na has a largest atomic radius as atomic radius decreases across a period from left to right.

Na as the tendency to lose electrons decreases across a period from left to right. So, Na is highly reactive as compared to Mg and Al.

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