Mass Defect & Binding energy

Nuclear binding energy is

• the energy required to overcome the electrostatic force between the protons in the nucleus

• energy equivalent of the mass of the protons in the nucleus

• the energy equivalent of the mass of all the nucleons in the nucleus

• the energy equivalent of the difference between the total mass of the individual nucleons and their mass when they are contained in the nucleus

Which of the following statements is/are correct

regarding the binding energy of the nucleus.

I. It is equivalent to the mass defect

II. It is the energy that holds the nucleus

together

III. It is the energy required to remove a

proton from the nucleus

• I only

• II only

• III only

• I and II only

The energy equivalent in joules of the mass of

2.0 *10^-31 𝑘𝑔 _____.

• 2.0 *10^-31𝐽

• 6.0 *10^-23 𝐽

• 1.8 * 10^-14𝐽

• 8.2 * 10^-14 𝐽

Which graph best represents the relationship

between energy and mass when matter is converted

into energy?

• A

• B

• C

• D

Why does an atom undergo beta decay?

• It has too many electrons.
• It has an atomic number greater than 83
• It has more neutrons than protons
• It has more protons than neutrons

An isotope with a high Binding Energy per nucleon:

• will decay in a short period of time

• is very unstable

• is very stable

• has more protons than neutrons.

Elements to the right of Iron will undergo

• Fusion to become more stable

• Fission to become more stable

Elements to the left of Iron will undergo

• Fusion to become more stable

• Fission to become more stable

How much energy is equivalent to 1 electron volt.

• 1 J

• 1.6 x 10^-19 J

• 1.6 x 10¹⁹ J

As the binding energy of a nucleus increases, the

energy required to separate the nucleus into

nucleons _____.

• decreases

• increases

• stays the same

• becomes negative to positive