Question

Most comfortable unit to measure distances in nucleus of an atom is
1. millimeter
2. micrometer
3. Fermi
4. Angstrom

Answer 1

Correct Answer - Option 3 : Fermi

Concept:

• Distances between two nucleons (protons and neutrons) in the nucleus of an atom are under the range of 10 ^-15 m.

1 Fermi = 10 ^-15 m

Explanation:

• Since two nucleons are at an average distance of 10 ^-15 m, we can say that it will be comfortable to use the unit of measuring distances is fermi.

• 1 millimeter = 10 ^-3 m
• 1 micrometer = 10 ^-6 m
• 1 Angstrom = 10 ^-10  m
• Nuclear Force act between Nucleons when the distance between them is in the range of fermi (10 ^-15 m).
• The force is short-ranged and strong enough to overcome the electrostatic force between two protons in the nucleus. 
• If the distance is more than fermi, then electrostatic force becomes stronger.