Atomic Structure Of Particle Table Vocab. Flashcards
1
Q
Atom
A
Smallest unit of matter that has properties of an element
2
Q
Proton
A
Positively charge substance atomic particle in the nucleus +1
3
Q
Neutron
A
Neutral substance particle in the nucleus
4
Q
Electron
A
Negatively charged substance particle outside of the nucleus -1
5
Q
Nucleus
A
Center of an atom has protons + nucleus
6
Q
Atomic number
A
The number of protons identifies as an atom
7
Q
Mass number
A
The number of protons + neutrons
8
Q
Group number
A
Column on the periodic table have the same number of valence electrons
9
Q
Period
A
A row on the periodic table
10
Q
Valence electron
A
Electrons in the outermost energy shell they determine reactivity
