Which of the following options does not represent ground state electronic configuration of an atom?

1. 1s22s22p63s23p63d84s2

2. 1s22s22p63s23p63d94s2

3. 1s22s22p63s23p63d104s1

4. 1s22s22p63s23p63d54s1

Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
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Which pair of ions has the same electronic configuration?

1. \(Cr^{3+}, Fe^{3+}\) 2. \(Fe^{3+}, Mn^{2+}\)
3. \(Fe^{3+}, Co^{3+}\) 4. \(Sc^{3+}, Cr^{3+}\)
Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
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Match the following species with their corresponding ground state electronic configuration.

Atom/Ion Electronic configuration
A. Cu 1.  1s22s22p63s23p63d10
B. Cu2+ 2.  1s22s22p63s23p63d104s2
C. Zn2+ 3.  1s22s22p63s23p63d104s1
D. Cr3+ 4.  1s22s22p63s23p63d9
5.  1s22s22p63s23p63d3
 
A B C D
1. 4 2 5 1
2. 3 4 1 5
3. 3 2 1 4
4. 4 2 1 3
Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
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Match the ensuing rules with the corresponding statements:
 

Rules Statements
A. Hund’s Rule 1. No two electrons in an atom can have the same set of four quantum numbers.
B. Aufbau Principle 2. Half-filled and completely filled orbitals have extra stability.
C. Pauli's Exclusion Principle 3. Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied.
D. Heisenberg’s Uncertainty Principle 4. It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously.
5. In the ground state of atoms, orbitals are filled in the order of their increasing energies.
 
A B C D
1. 3 5 1 2
2. 1 2 3 4
3. 3 5 1 4
4. 4 5 3 2
Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
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Match Column-I with Column-II and choose the appropriate option:

Column-I 
(Species)
Column-II 
(Electronic Configuration)
A. \(Cr\) (i). \([Ar]3d^84s^0\)
B. \(Fe^{2+}\) (ii). \([Ar]3d^{10}4s^1\)
C. \(Ni^{2+}\) (iii). \([Ar]3d^64s^0\)
D. \(Cu\) (iv). \([Ar]3d^54s^1\)
(v). \([Ar]3d^64s^2\)
 
Options:  A   B   C   D 
1.  iv  iii  i  ii
2.  i  ii  iii  v
3.  v  iv  iii  ii
4.  iv  v  iii  ii
Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
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