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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The number of angular nodes and radial nodes in 3s orbital are

1. 0 and 2, respectively

2. 1 and 0, respectively

3. 3 and 0, respectively

4. 0 and 1, respectively

Subtopic:  Nodal Plane |
 75%
From NCERT
NEET - 2020
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Orbital having 3 angular nodes and 3 total nodes is:
1. 5 p
2. 3 d
3. 4 f
4. 6 d

Subtopic:  Nodal Plane |
 76%
From NCERT
NEET - 2019
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According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
1. n = 5 to n = 3
2. n = 6 to n = 1
3. n = 5 to n = 4
4. n = 6 to n = 5

Subtopic:  Hydrogen Spectra |
 66%
From NCERT
AIPMT - 2011
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A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be:

(h=6.6×10-34 Js)

1. 6.6×10-34m

2. 1.0×10-35 m

3. 1.0×10-32m

4. 6.6×10-32 m

Subtopic:  De Broglie Equation |
 80%
From NCERT
AIPMT - 2010
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The nuclei of which one of the following pairs are isotones:

1. \(34 \mathrm{Se}^{74},{ }_{31} \mathrm{Ga}^{71}\) 2. \({ }_{38} \mathrm{Sr}^{84},{ }_{38} \mathrm{Sr}^{86}\)
3. \({ }_{42} \mathrm{Mo}^{92},{ }_{40} \mathrm{Zr}^{92}\) 4. \({ }_{20} \mathrm{Ca}^{40},{ }_{16} \mathrm{~S}^{32}\)
Subtopic:  Number of Electron, Proton & Neutron |
 82%
From NCERT
AIPMT - 2005
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If the energy value is E = 3.03 × 10–19 Joules, (h = 6.6×10–34 J x sec., C = 3×108 m/sec), then the value of the corresponding wavelength is:

1. 65.3 nm 2. 6.53 nm
3. 3.4 nm 4. 653 nm
Subtopic:  Planck's Theory |
 73%
From NCERT
AIPMT - 2000
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If the energy of the second Bohr orbit of the hydrogen atom is –328 kJ mol–1, the energy of the fourth Bohr orbit would be:

1. –1312 kJ mol–1 2. –82 kJ mol–1
3. –41 kJ mol–1 4. –164 kJ mol–1
Subtopic:  Bohr's Theory |
 75%
From NCERT
AIPMT - 2005
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Which of the following molecule is not paramagnetic:
1. Cu++

2. Fe2+

3. Cl-

4. None of the above 

Subtopic:  Pauli's Exclusion Principle & Hund's Rule |
 67%
From NCERT
AIPMT - 1998
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The radius of a hydrogen shell is 0.53Å. In its first excited state, radius of the shell will be:
1. 2.12 Å
2. 1.06 Å
3. 8.5 Å
4. 4.24 Å

Subtopic:  Bohr's Theory |
 80%
From NCERT
AIPMT - 1998
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