If the series limit of Lyman series for hydrogen atom is equal to the series limit of Balmer series for a hydrogen like atom, then atomic number of this hydrogen like atom is
Options […]
The order of radius of the nucleus of an atom is
Options
(a) 10⁻¹⁰ m (b) 10⁻¹² m (c) 10⁻¹⁵ m (d) 10⁻¹⁷ m
Correct Answer:
10⁻¹⁵ m
Explanation:
No explanation available. Be […]
The energy of a hydrogen atom in the ground state is -13.6 eV. The energy of a He⁺ ion in the first excited state will be
Options
(a) – 13.6 eV (b) – […]
The ratio of volumes of nuclei (assumed to be in spherical shape) with respective mass number 8 and 64 is
Options
(a) 0.5 (b) 2 (c) 0.125 (d) 0.25
Correct Answer:
0.125
Explanation: […]
Which series of hydrogen spectrum corresponds to ultraviolet region?
Options
(a) Balmer series (b) Brackett series (c) Paschen series (d) Lyman series
Correct Answer:
Lyman series
Explanation:
No explanation available. Be the first […]
In a Rutherford scattering experiment when a projectile of charge Z₁ and mass M₁ approaches a target nucleus of charge Z₂ and mass M₂, the distance of closest approach is r. The energy of the […]
The cadmium rods are used in nuclear reactor to
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(a) Speed up neutrons (b) Slow down neutrons (c) Emit neutrons (d) Absorb some neutrons
Correct Answer:
Absorb some neutrons
Explanation:
No explanation […]
Spectrum of X-rays is
Options
(a) continous (b) linear (c) continous and linear (d) band
Correct Answer:
continous
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
The total energy of electron in the ground state of hydrogen atom is -13.6 eV. The kinetic energy of an electron in the first excited state is
Options
(a) 6.8 eV (b) 13.6 […]
The radius of the first orbit of the hydrogen atom is a₀. The radius of the second orbit will be
Options
(a) 4 a₀ (b) 6 a₀ (c) 8 a₀ (d) 10 a₀
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