Which one of the following electrons in the ground state will have least amount of energy?

1. An electron in hydrogen atom.
2. An electron in 2p orbital of carbon atom.
3. The electron of copper atom present in 4s orbital.
4. The outermost electron in sodium atom.
Subtopic:  AUFBAU Principle |
 65%
From NCERT
NEET - 2022
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4d, 5p, 5f, and 6p orbitals are arranged in the order of decreasing energy.
The correct option is:

1.  5f>6p>4d>5p

2.  5f>6p>5p>4d

3.  6p>5f>5p>4d

4.  6p>5f>4d>5p

Subtopic:  AUFBAU Principle |
 67%
From NCERT
NEET - 2019
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The incorrect statement among the following is:

1. Total orbital angular momentum of an electron in 's' orbital is equal to zero.
2. An orbital is designated by three quantum numbers, while an electron in an atom is designated by four quantum numbers.
3. The electronic configuration of N atom is 
4. The value of m for dz2 is zero.
Subtopic:  AUFBAU Principle |
 79%
From NCERT
NEET - 2018
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The element Z = 114 has been discovered recently. Family/group and electronic configuration from which it  will belong are:

1. Carbon family and  [Rn] 5f14 6d10 7s7p2
2. Oxygen family and [Rn] 5f14 6d10 7s2 7p4
3. Nitrogen family and [Rn] 5f14 6d10 7s2 7p6
4. Halogen family and [Rn] 5f14 6d10 7s2 7p5

Subtopic:  AUFBAU Principle |
 78%
From NCERT
NEET - 2017
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How many electrons can fit in the subshell for which n = 3 and l = 1?
1. 2
2. 6
3. 10
4. 14

Subtopic:  AUFBAU Principle |
 73%
From NCERT
NEET - 2016
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Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?
1. 3s 4s 3p 3d
2. 4s 3s 3p 3d
3. 3s 3p 3d 4s
4. 3s 3p 4s 3d

Subtopic:  AUFBAU Principle |
 77%
From NCERT
NEET - 2015
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If n = 6, the correct sequence for the filling of electrons will be: 

1. ns  n-1 d  n-2 f  np

2. ns - n-2 f  np  n-1 d

3. ns - np  n-1d  n-2 f

4. ns  n-2 f  n-1 d  np

Subtopic:  AUFBAU Principle |
 64%
From NCERT
AIPMT - 2011
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