Atomic Structure + Periodic Table Vocab Flashcards
1
Q
The smallest unit of matter that has the properties of an element
A
Atom
2
Q
Positively charged subatomic particle in the nucleus
A
Proton
3
Q
Neutral subatomic particle in the nucleus
A
Neutron
4
Q
Negatively charged subatomic particle outside the nucleus
A
Electron
5
Q
Center of an atom, has protons and electrons
A
Nucleus
6
Q
Number of protons, identifies an atom
A
Atomic number
7
Q
The number of protons + neutrons
A
Mass number
8
Q
Column on the periodic table, have the same number of valence electrons
A
Group number
9
Q
A row on the periodic table
A
Period
10
Q
Electrons in the outermost energy cell. They determine reactivity
A
Valence electron
