JEE Main Chemistry Class 11 Structure of Atom Part 2 Questions

‌ (A) ‌Cr(24)=1s22s22p63s23p63d54s1
=[Ar]3d54s1
(B) Magnetic quantum number (m) values ranging from −I to +∣ including zero.
∴ It can have negative value.
(C) According to Aufbau rule, electrons are filled first in these orbitals which have low energy.
∴ Statement C is correct.
(D) We know,
Number of Radial nodes =n−I−1
and number of Angular nodes =1
∴ Total nodes =n−I−1+1=n−1