1. Class 10
  2. Chapter 5 Class 10 - Periodic Classification of Elements
  3. Past Year - 3 Mark Questions
Check sibling questions

Question 17 - Past Year - 3 Mark Questions - Chapter 5 Class 10 - Periodic Classification of Elements

Last updated at Dec. 13, 2024 by Teachoo

(i) Name the element with atomic number 17.

(ii) To which period does it belong?

(iii) To which group does it belong?

(iv) Write its electronic configuration.

 

Answer

1. The element with atomic number 17 is Chlorine .

Electronic configuration of Chlorine: 2, 8, 7

2. Since there are 3 shells, it belongs to the third period .

3. Group number = 10 + Number of electrons in outermost shell = 10 + 7 = 17

4. Electronic configuration: 2, 8, 7

  1. Class 10
  2. Chapter 5 Class 10 - Periodic Classification of Elements

    3. Past Year - 3 Mark Questions

    Past Year - 5 Mark Questions →
Past Year - 5 Mark Questions →
Class 10
Chapter 5 Class 10 - Periodic Classification of Elements

About the Author

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo