The number of electrons in the species H2+ , H2 , O2+,  are respectively

1. 15, 2, 1

2. 15, 1, 2

3. 1, 2, 15

4. 2, 1, 15

Subtopic:  Number of Electron, Proton & Neutron |
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The maximum number of neutrons are present in the nuclei of

1. O8162. Mg12243. Fe26564. Sr3888

Subtopic:  Number of Electron, Proton & Neutron |
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The complete symbol for the atom with the given atomic number (Z) and atomic mass (A) would be, respectively,
i. Z = 17 , A = 35.
ii. Z = 92 , A = 233.
iii. Z = 4 , A = 9.
1.  Be49   U92233     Be49
2.  Cl1735    U92233    Be49
3.  Be49    Cl1735     U92233
4. U92233    Be49    Cl1735

Subtopic:  Number of Electron, Proton & Neutron |
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Property which is same for the following species is:

 N3, O2–, F, Na+, Mg2+ and Al3+ 

1. Ionic radii

2. Number of electrons

3. Nuclear charge

4. None of the above 

Subtopic:  Number of Electron, Proton & Neutron |
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An atom of an element contains 29 electrons and 35 neutrons. The number of protons in the element would be

1. 29

2. 35

3. 6

4. 64

Subtopic:  Number of Electron, Proton & Neutron |
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The charge on the oil drop is –1.282 × 10–18C. The number of electrons present in it would be 

1. 15

2. 8

3. 2

4. 6

Subtopic:  Number of Electron, Proton & Neutron |
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The number of protons, neutrons and electrons in Lu71175, respectively, are:

1.  104, 71 and 71

2.  71, 71 and 104

3.  175, 104 and 71

4.  71, 104 and 71 

Subtopic:  Introduction of Atomic Structure | Number of Electron, Proton & Neutron |
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Which of the following has greater number of electrons than neutrons?

1. Al3+

2. O2-

3. F-

4. C

Subtopic:  Number of Electron, Proton & Neutron |
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The number of electrons in  19 K with quantum numbers n=3; l=0 is/are

1. 1

2. 2

3. 4

4. 3

Subtopic:  Number of Electron, Proton & Neutron |
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Assertion: Zn(ll) salts are diamagnetic.

Reason: Zn2+ ion has one unpaired electron.

1. Both the assertion and the reason are true and the reason is the correct explanation of the assertion. 

2. Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.

3. The assertion is true, but the reason is incorrect.

4. Both the assertion and the reason are false statements.

Subtopic:  Number of Electron, Proton & Neutron |
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