Which is the correct order of increasing energy of the listed orbital’s 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 |
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The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of :
1. s-electrons in Mg (Z = 12)
2. p-electrons in Cl (Z = 17)
3. d-electrons in Fe (Z = 26)
4. p-electrons in Ne (Z = 10)

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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 |
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