Fri November 16, 2012 By:

How would you justify the presence of 18 elements in the fifth period of the periodic table?

Expert Reply
Mon November 19, 2012
While filling 5th shell according to aufbau principle 5s,5p.4d filled so 2 +6 +10 =18 electrons or elements are present in 5th shell.
Tue March 07, 2017


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