Question

2.10. An element X has atomic number 9 and element Y has atomic number 17
() in which period each will be placed?
un Which one of them will have larger atomic radius and why?​

Answer 1

Answer:

Atomic number =9 =Fluorine

2nd period

Atomic number = 17 =Chlorine

3rd period

Chlorine has large atomic radius because, down the group atomic radius increase.

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