Atomic Structure Flashcards
1
Q
The smallest unit of an element
A
Atom
2
Q
A subatomic particle that has a negative charge
A
Electron
3
Q
In physical science, aton’s central region
A
Nucleus
4
Q
A subatomic particle that has a positive charge
A
Proton
5
Q
A subatomic particle that has no charge
A
Neutron
6
Q
A region around the nucleus
A
Electron cloud
7
Q
The numbers of protons in atoms
A
Atomic number
8
Q
The total mass of protons and neutrons in a atom
A
Mass number
