Test on Atoms

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Question 1

A hydrogen atom in ground state absorbs 10.2 eV of energy. The orbital angular momentum of electrons is increased by

• A1.05 × 10^-34 J-S
• B4.22 × 10^-34 J-S
• C3.16 × 10^-34 J-S

Question 2

The compound unstable nucleus often decays in accordance with the following reaction other particles
In the nuclear reaction presented above, the other particles might be

• Aan alpha particle, which consists of two protons and two neutrons
• Btwo protons
• Cone proton and one neutron
• Dtwo neutrons

Question 3

A neutron having kinetic energy 13.6 eV collides with a hydrogen atom in ground state at rest. Assume that the mass of neutron and hydrogen atoms are same and the neutron does not leave its line of motion. Then which of the following is the possible KE of the neutron after the collision

• Azero
• B3.4 eV
• C1.5 eV
• D6.8 eV

Question 4

The compound unstable nucleus often decays in accordance with the following reaction other particles. In the nuclear reaction presented above, the other particles might be

• Aan alpha particle, which consists of two protons and two neutrons
• Btwo protons
• Cone proton and one neutron
• Dtwo neutrons

Question 5

The minimum orbit angular momentum of the electron in a hydrogen atom is

• Ah
• Bh/2
• Ch/2π
• Dh/λ

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