Atomic Structure Flashcards
(4 cards)
1
Q
What is the nucleus of an atom composed of?
A
Protons and Neutrons.
2
Q
What happens when an electron drops to a low energy level in an atom?
A
It releases a photon of electromagnetic radiation.
3
Q
What is the atomic number on an element?
A
The number of protons in an atom.
4
Q
What is the mass number on an element?
A
The total number of protons and neutrons in an atom.
