Atomic Structure Flashcards
1
Q
Smallest unit of an element
A
Atom
2
Q
Subatomic particle that has a negative charge
A
Electron
3
Q
Atom’s central region, contains protons and neutrons
A
Nucleus
4
Q
Subatomic particle with a positive charge; in the nucleus
A
Proton
5
Q
Subatomic particle with no charge
A
Neutron
6
Q
Region around nucleus; electrons are found
A
Electron cloud
7
Q
Number of protons in the nucleus of an atom
A
Atomic number
8
Q
Total mass of protons and neutrons in the nucleus
A
Mass number
