Ask a Question

a. 3Li, 14Si, 2He, 11Na, 15P Which of these elements belong to be period 3?

0 votes
1.4k views
in Chapter 2: Periodic Classification of Element by (98.9k points)
edited

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.

a. 3Li, 14Si, 2He, 11Na, 15P Which of these elements belong to be period 3?

1 Answer

0 votes
by (98.9k points)
selected by
 
Best answer

Electronic configuration of the following elements is:
3Li = 2,1
14Si =2,8,4
2He= 2
11Na = 2,8,1
15P = 2,8,5
 According to electronic configuration of 14Si, 11Na, 15P, each element contains three shell i.e. K,L,M. , Hence belong to the third period

Related questions

Doubtly is an online community for engineering students, offering:

  • Free viva questions PDFs
  • Previous year question papers (PYQs)
  • Academic doubt solutions
  • Expert-guided solutions

Get the pro version for free by logging in!

Most popular tags

jeemain geography-10th engineering physics semester 5 web computing

5.7k questions

5.1k answers

108 comments

557 users

Doubtly
...