What does the nucleus of an atom contain? 

What is the definition of a “photon” in the context of electromagnetic radiation? 

What type of energy is specifically utilized in radiography? 

What is defined as the smallest particle of an element? 

What is defined as the smallest particle of an element? 

What is the term for the process where electrons are “boiled off” from atoms? 

What does the nucleus of an atom contain? 

What is the term for the process where electrons are “boiled off” from atoms? 

How do photons interact with matter? 

What is the primary characteristic of the space an atom occupies?