Nuclear

When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....

• remains the same
•   decreases by one.
• increases by one.
• increases by two.

The process of the production of lighter nuclei from heavier nuclei is called

• mass energy
• magneticism
• fusion
• fission

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• uranium

The most penetrating type of radiation is the ____.  

• alpha particle
• gamma ray
• beta particle
• uranium

Negatively charged particles emitted from a nucleus at a high speed are ____.  

• alpha particle
• gamma rays
• beta particles
• X rays

The process by which nuclei having low masses are united to form nuclei with larger masses is ____.  

• a chain reaction 
• fission
• a chemical reaction 
• fusion 

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

What is a half-life?

• The average time it takes for any element to disappear completely 
• The time it takes for a radioactive atom to lose half its neutrons
• The time it takes for half of any number of radioactive atoms to decay
• The time it takes for a radioactive atom to lose half its electrons 

What do these symbols represent?

• alpha particle
• beta particle
• neutron
• gamma ray

How many protons are in this atom?

• 3
• 4
• 6
• 10