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Get Answers to all your Questions
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- #Classification of elements and periodicity in properties
- #Class 11
The element with atomic number 35 belongs to which group?
Option: 1
Group 7
Option: 2
Group 17
Option: 3
Group 13
Option: 4
Group 16
Answers (1)
The electronic configuration of the element is
1s22s22p63s23p64s23d104p5
The maximum principle quantum number in which the last electron entered is 4, hence the period of the element is 4.
The last electron enters the p- subshell hence the element belongs to the p block.
For p- block elements the group number is equal to
10 + Number of electrons in ns + number of electron np subshells.
hence the element belongs to group number 17.
hence, opt (B) is correct.
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