Which of the following statements is incorrect?

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

The 4th period in the periodic table ends at krypton with the filling up of the 3p-orbitals

The 5th period in the periodic table contains the 4d-transition series

Starting element of 4d-transition series is yttrium

Filling up of the 4f-orbitals begins with cerium

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The fourth period ends at krypton with the filling up of the 4p-orbitals. Altogether 18 elements are present in this fourth period.

Watch 3-min video & get full concept clarity