MCQ post 01: Atomic physics Quiz

 

Atomic Physics Quiz

1. Which orbital electron has least binding energy?

a) M shell
b) N shell
c) K shell
d) L shell

2. The radius of a nucleus is how much smaller than that of an atom

a) 100 times
b) 1000 times
c) 10000 times
d) 100000 times

3. Nuclear binding energies are usually expressed in units of

a) eV
b) Joules
c) KeV
d) MeV

4. The Hydrogen-3 nucleus (also called Tritium) consists of

a) Two neutrons and one proton
b) Two neutrons and no protons
c) Two neutrons and two protons
d) Two protons and one neutron

5. Which one of the following is a nucleon?

a) Proton
b) Molecule
c) Electron
d) Positron

6. For nuclear stability

a) A is directly proportional to Z
b) A is proportional to Z square
c) A binding energy of at least 931.48 MeV is required
d) The number of protons must exceed the number of neutrons

7. Gamma-ray photons have

a) No mass and an electric charge of +1
b) No mass and an electric charge of -1
c) No mass and no electric charge
d) No mass and an electric charge of +2

8. Positron Emission involves the ejection of

a) A proton and a neutron
b) A beta-plus particle
c) An alpha-particle
d) A beta-minus particle

9. Electron Capture involves

a) an electron combining with a neutron
b) an electron combining with a proton
c) a neutron being ejected from the nucleus
d) an electron being ejected from the nucleus

10. In Positron Emission

a) Z decreases by 1 and A remains the same
b) Z remains the same and A decreases by 1
c) Z remains the same and A increases by 1
d) Z increases by 1 and A remains the same