Imagine a universe in which principal quantum number have same possible value as in our universe except angular quantum number ( ℓ ) can have value from [ 0 , 1 , 2 , …… n + 1 ] . Magnetic quantum num

Question

Imagine a universe in which principal quantum number have same possible value as in our universe except angular quantum number ( $ℓ$ ) can have value from $[0, 1, 2, \dots\dots n + 1]$ .

Magnetic quantum number ( m ) can have value from [ $- (ℓ)$ to $+ (ℓ)$ ] [including zero].

Spin quantum number $(m_{s})$ can have value $= [- \frac{1}{2}, 0, + \frac{1}{2}]$

Now find the maximum number of elements that can be possible in $2^{nd}$ period.

(The other rules, such as Aufbau, Hund's or Pauli has same characteristics as before.)

TestHub · Accepted Answer

n= 1 will now have 1s, 1p and 1d subshells.

n=2 will now have 2s,2p,2d and 2f according to new rules since "l" can have values 0,1,2 and 3.

2nd period will start with 2s and will end on 2p.

After 2s subshell, 1d will be filled and then 2p according to Aufbau rule

since m_s can have 3 values, 2s will have 3 electrons ; 1d will have 15 electrons and 2p will have 9 electrons(3 in each orbital).

Hence total 27 elements possible.

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JEE Advanced 2028 (Class 11)