1.

Write down the characteristics of the elements having atomic number 17. 1) Electronic configuration ___________ 2) Period number _____________ 3) Group number _____________ 4) Element family ____________ 5) No. of valence electrons ___________6) Valency _____________ 7) Metal or non-metal ____________

Answer»

1. 1s2 2s2 2p6 3s2 3p 

2. 3 

3. VII A or 17 

4. Halogen family 

5. 7 

6. 1 

7. Non-metal



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