Which of the following properties of atom could be explained correctly by Thomson model of atom?

1. Overall neutrality of atom

2. Spectra of hydrogen atom

3. Position of electrons, protons and neutrons in atom

4. Stability of atom

Subtopic:  Introduction of Atomic Structure |
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Two atoms are said to be isobars if :

1. They have same atomic number but different mass number

2. They have same number of electrons but different number of neutrons

3. They have same number of neutrons but different numbers of electrons

4. Sum of the number of protons and neutrons is the same but the number of protons is different

Subtopic:  Number of Electron, Proton & Neutron |
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The number of radial nodes for 3p orbital is ______.

1. 3

2. 4

3. 2

4. 1

Subtopic:  Nodal Plane |
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The number of angular nodes for 4d orbital is -

1.  4

2.  3

3.  2

4.  1

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons?

1. Pauli's exclusion principle

2. Heisenberg's uncertainty principle

3. Hund's rule of maximum multiplicity

4. Aufbau principle

Subtopic:  Heisenberg Uncertainty Principle |
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Total number of orbitals associated with third shell will be _____.

1.  2

2.  4

3.  9

4.  3

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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Orbital angular momentum depends on _______.

1.  l

2.  n and l

3.  n and ml

4.  ml and ms

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
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Chlorine exists in two isotopic forms, Cl-37 and Cl-35, but its atomic mass is 35.5. This indicates the ratio of Cl-37 and Cl-35 is approximately :

1. 1:2

2. 1:1

3. 1:3

4. 3:1

Subtopic:  Number of Electron, Proton & Neutron |
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The pair of ions having the same electronic configuration is -

1.  Cr3+, Fe3+

2.  Fe3+, Mn2+

3.  Fe3+, Co3+

4.  Sc3+, Cr3+

Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
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For the electrons of an oxygen atom. The correct statement among the following is-

1. Zeff for an electron in a 2s orbital is the same as Zeff for an electron in a 2p orbital.

2. An electron in the 2s orbital has the same energy as an electron in the 2p orbital.

3. Zeff for an electron in 1s orbital is the same as Zeff for an electron in a 2s orbital

4. The two electrons present in the 2s orbital have same spin quantum numbers ms but of opposite sign

Subtopic:  Quantum Numbers & Schrodinger Wave Equation | Shell & Subshell |
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