The number of electrons in the species ${\mathrm{H}}_{2}^{+}$ $,$ ${\mathrm{H}}_{2}$ $,$ ${\mathrm{O}}_{2}^{+}$,  are respectively:

1. 15, 2, 1

2. 15, 1, 2

3. 1, 2, 15

4. 2, 1, 15

Subtopic:  Number of Electron, Proton & Neutron |
92%
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The maximum number of neutrons are present in the nuclei of

$1.$ ${\mathrm{O}}_{8}^{16}$
$2.$ ${\mathrm{Mg}}_{12}^{24}$
$3.$ ${\mathrm{Fe}}_{26}^{56}$
$4.$ ${\mathrm{Sr}}_{38}^{88}$

Subtopic:  Number of Electron, Proton & Neutron |
92%
From NCERT
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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.  ${}_{4}{}^{9}\mathrm{Be}$   ${}_{92}{}^{233}\mathrm{U}$     ${}_{4}{}^{9}\mathrm{Be}$

2.  ${}_{17}{}^{35}\mathrm{Cl}$    ${}_{92}{}^{233}\mathrm{U}$    ${}_{4}{}^{9}\mathrm{Be}$

3.  ${}_{4}{}^{9}\mathrm{Be}$    ${}_{17}{}^{35}\mathrm{Cl}$     ${}_{92}{}^{233}\mathrm{U}$

4. ${}_{92}{}^{233}\mathrm{U}$    ${}_{4}{}^{9}\mathrm{Be}$    ${}_{17}{}^{35}\mathrm{Cl}$

Subtopic:  Number of Electron, Proton & Neutron |
89%
From NCERT
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Property which is same for the following species is:

N3, O2–, F, Na+, Mg2+ and Al3+

2. Number of electrons

3. Nuclear charge

4. None of the above

Subtopic:  Number of Electron, Proton & Neutron |
87%
From NCERT
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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 |
83%
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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 |
81%
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The number of protons, neutrons, and electrons in  $$_{71}^{175}Lu$$ 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 |
81%
From NCERT
NEET - 2020
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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 |
75%
From NCERT
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The number of electrons in  19 K with quantum numbers n=3; l=0 is/are:

1. 2

2. 1

3. 4

4. 3

Subtopic:  Number of Electron, Proton & Neutron |
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 Assertion (A): Zn(ll) salts are diamagnetic. Reason (R): Zn2+ ion has one unpaired electron.

 1 Both (A) and (R) are true and (R) is the correct explanation of (A). 2 Both (A) and (R) are true but (R) is not the correct explanation of (A). 3 (A) is true but (R) is false. 4 Both (A) and (R) are false.

Subtopic:  Number of Electron, Proton & Neutron |
74%
From NCERT
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