Write down the characteristics of the elements having atomic number 17 .
Electronic configuration ____________
period number _____________
Group number _______________
Element family __________
No . Of valence electrons ___________
valency ____________
metal or non - metal _______________

Explanation

Electronic configuration `1s ^(2) 2s ^(2) 2p ^(6) 3s ^(2) 3p ^(5) `
period number :3
Group number :VIIA or 17
Element family Halogen family
No . Of valence electrons :7
valency :7
metal or non - metal : non metal