Q31.Ionisation energy of He+ is 19.6 × 10−18 Jatom−1 . The energy of the first stationary state (n = 1) of Li2+ is (1) 4.41 × 10−16 Jatom−1 (2) −4.41 × 10−17 Jatom −1 (3) −2.2 × 10−15 Jatom−1 (4) 8.82 × 10−17 Jatom −1
What This Question Tests
This question tests the understanding of Bohr's model for hydrogenic species and the definition of ionization energy to calculate the energy of an electron in another hydrogenic species.
Concepts Tested
Formulas Used
E_n = -R_H * Z^2 / n^2
Ionisation Energy = -E_1
📚 NCERT Sections This Tests
12.4 — The Ground State Energy Of Hydrogen Atom Is –13.6 Ev. What Are The
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12.4 The ground state energy of hydrogen atom is –13.6 eV. What are the kinetic and potential energies of the electron in this state?
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12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
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12.7 The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. What are the radii of the n = 2 and n =3 orbits?
📋 Question Details
- Chapter
- Atomic Structure
- Topic
- Bohr's model, Energy of electron
- Year
- 2010
- Shift
- Unknown
- Q Number
- Q31
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 2: Atomic Structure
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