Question

please answer me correctly I will mark you as Brainlist and Thanks you​

Answer 1

Answer:

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Explanation:

1. element p ie chlorine element q ie argon element r ie sodium all belongs to period 3 as they contain 3 shells

2.its sodium ie element r

4.its element p ie chlorine

as it is a non metal

5.element q ie argon as it has fully complete configuration