Nuclear Forces

Which of these processes describes a nuclear fusion reaction?

• A nucleus absorbs energy to produce lighter nuclei.

• A nucleus splits to produce energy and lighter nuclei

• Two nuclei bind together to produce energy and heavier nuclei.

• Two nuclei bind together to produce energy and a lighter nuclei.

When does radioactive decay occur?

• When the nucleus of an isotope is unstable
• When the nucleus of an isotope is stable
• When the electrons of an isotope are spinning
• When the electrons of an isotope are shared with another isotope

Neutrons ......

• has positive electric charge with equal magnitude to that of an electron.

• has no net electric charge.

• has negative electric charge.

• orbiting the nucleus.

What kind of force holds the nucleus together?

• Strong Nuclear Force

• Weak Nuclear Force

• Gravitational Force

• Electromagnetic Force

The strongest of the four fundamental forces is: 

• Gravity 
• Electromagnetism
• Strong Nuclear 
• Weak Nuclear 

When an atom undergoes radioactive decay,  the energy that is released is due to: 

• Gravity 
• Electromagnetism 
• Strong Nuclear 
• Weak Nuclear 

_____________ is the force that binds protons together in the nucleus of an atom. 

• Gravity 
• Electromagnetism 
• Strong Nuclear 
• Weak Nuclear 

True or false: Mass can be converted into energy

• true

• false

During nuclear fission, a nucleus _________.

• grows

• divides

• shrinks

• combines with another

When two smaller nuclei come together, it is called ________.

• nuclear fission

• nuclear fusion

• chain reaction

• critical mass