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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The 6563 Å line emitted by hydrogen atom in a star is found to be red shifted by 5Å
- A capacitor of capacitance 100μF is charged by connecting it to a battery of voltage
- The escape velocity from the earth’s surface is 11 kms⁻¹.A certain planet
- A single slit Fraunhogger diffraction pattern is formed with white light.
- The flux linked with a circuit is given by φ=t³+3t-7. The graph between time
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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