Atomic Structure Flashcards
1
Q
The smallest unit of an element
A
atom
2
Q
A subatomic particle that has a negative change
A
Electron
3
Q
In physical science, an atom’s central region
A
Nucleus
4
Q
A subatomic particle that has a positive charge; contains protons and neutrons
A
Proton
5
Q
A subatomic particle that has no charge
A
Neutron
6
Q
A region around the nucleus of an atom where electrons are found
A
Electron cloud
7
Q
The number of protons in the nucleus of an atom and identifies the atom
A
Atomic number
8
Q
The sum of protons and neutrons
A
Mass numbers
