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In which of the following systems will the radius of the first orbit (n=1) be minimum?
Options
(a) Single ionised helium
(b) Deutron atom
(c) Hydrogen atom
(d) Doubly ionised lithium
Correct Answer:
Doubly ionised lithium
Explanation:
r ∝ 1 / Z. For doubly ionised lithium, Z = 3
.·. r will be minimum.
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Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Heat is flowing through a rod of length 50 cm and area of cross-section 5 cm².
- An electric current passes through a long straight wire
- A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
- Two discs of same material and thickness have radii 0.2 m and 0.6 m.
- According to Bohr model of hydrogen atom, only those orbits are permissible
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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“r ∝ 1 / Z. For doubly ionised lithium, Z = 3
.·. r will be minimum.”