Ata, Vocab Pt 1 Flashcards
1
Q
Atom
A
Smallest unit of matter that has the properties of an element
2
Q
Proton
A
Positively charged subatomic particles in the nucleus
3
Q
Neutron
A
Neutral subatomic particle in the nucleus
4
Q
Electron
A
Negatively charged subatomic particle outside of the nucleus
5
Q
Atomic number number
A
The number of protons identifies an atom
6
Q
Mass number
A
The number of protons and neutrons
7
Q
Group number
A
Column on the periodic table that have the same number of balance electrons
8
Q
Period
A
I row on the periodic table
9
Q
Valence electrons
A
Electrons in the outermost energy shells
10
Q
Nucleus
A
Cemetery of an atom has protons and neutrons
