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Chapter 5 Class 10 - Periodic Classification of Elements

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

Last updated at April 16, 2024 by

(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

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