First of all Cr=1s2 2s2 2p6 3s2 3p6 4s1 3d5
electrons in l=1 : 12
Electrons in l=2 : 5
This is because :
For l = 0 1 2 3 4 5 ..........
Notation = s p d f g h ..........
These are some very basic question from the chapter Structure of Atom. You need to practice more such questions to ensure your scoring marks in entrance exams.
Best wishes. Thankyou.
Question : Two electrons in an orbital are differentiated by which of the following?
Option 1: Magnetic quantum number
Option 2: Spin quantum number
Option 3: Principal quantum number
Option 4: Azimuthal quantum number
Question : The orientation of an atomic orbital is governed by
Option 1: Principal quantum number
Option 2: Magnetic quantum number
Option 3: Spin quantum number
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