Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

In the ground state an element has 13 electrons in M shell.The element is

$\begin{array}{1 1}(a)\;Copper&(b)\;Chromium\\(c)\;Nickel&(d)\;Iron\end{array}$

Can you answer this question?

1 Answer

0 votes
M shell=3rd shell
Electronic configuration =$1s^2,2s^2,2p^6,3s^2,3p^6,4s^1,3d^5$
No of electron in 3rd shell =$3s^2,3p^6,3d^5$
$\Rightarrow 2+6+5=13$
$e^-=24$ in Cr
Hence (b) is the correct answer.
answered Nov 29, 2013 by sreemathi.v
Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App