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The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
Options
(a) 11.2×10⁻¹⁷ J
(b) 12.9×10⁻¹⁶ J
(c) 1.7×10⁻¹⁵ J
(d) 10×10⁻¹⁶ J
Correct Answer:
12.9×10⁻¹⁶ J
Explanation:
Required ionization energy, E = hc / λ
E = 6.6 × 10⁻³⁴ × 3 × 10⁸ / 1.5 × 10⁻¹°
= 12.9 × 10⁻¹⁶ J
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Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- As per Bohr model, the minimum energy (in eV) required to remove an electron
- The escape velocity from the earth’s surface is 11 kms⁻¹.A certain planet
- Number of electrons in one mC charge, given e=1.6×10⁻¹⁹ C, will be
- A long straight wire is carrying a current of 12 A. The magnetic field at a distance
- A beaker of radius 1.5 cm is filled with a liquid of surface tension 0.075 N/m
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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