8.6 Summary Notes - Mass Defect

Question 1

What are the four types of fundamental force?

Answer 1

Gravitational, weak (nuclear) force, electromagnetic, strong force

Question 2

Strong force

Answer 2

Force required to overcome the electrostatic repulsion happening within the nuclei of elements. Is an attractive force and acts over a very short distance (within the nucleus). Force binds the nuclei together.

Question 3

Mass defect (Δm)

Answer 3

The difference/ missing mass when the total mass of a nucleus is less than the sum of the individual nucleon’s masses.

Question 4

What is the force responsible for holding the particles in the nucleus together?

Answer 4

The strong force that comes from the mass defect energy.

Question 5

What units does the energy equivalence use?

Answer 5

MeV/c^2

Question 6

Gravitational force

Answer 6

Acts on masses
Weakest force
Always attractive
Infinite range

Question 7

Strong nuclear force

Answer 7

Acts in hadrons
Strongest of all forces
Always attractive
Very short range
Force-mediating particles are gluons

Question 8

Electromagnetic force

Answer 8

Acts on charges
Second strongest force
Attractive or repulsive
Infinite range
Force-mediating particles are photons

Question 9

Weak nuclear force

Answer 9

Acts on mass
Second weakest force
Always attractive
Infinite range
Force- mediating particles are gauge bosons