Atomic Structure Plus Periodic Table Flashcards
1
Q
Atom
A
Smallest unit of matter that has the same properties of an element.
2
Q
Proton
A
Positively charged subatomic particle in the nucleus (+1).
3
Q
Neutron
A
Neutral subatomic particle in the nucleus (0).
4
Q
Electrons
A
Negatively charged subatomic particle outside of the nucleus (-1).
5
Q
Nucleus
A
The center of an atom, Has protons plus neutrons.
6
Q
Atomic number
A
Number of protons, identifies an atom.
7
Q
Mass number
A
Number of protons plus number of neutrons.
8
Q
Group
A
Column on the periodic table, has the same number of valence electrons
9
Q
Period
A
Row in the periodic table
10
Q
Valance electrons
A
Electrons in the outermost energy shell that determine reactivity.
