Atomic Structure and Periodic Table Vocab Flashcards
1
Q
Atom
A
the smallest unit of matter that has the properties of an element
2
Q
Proton
A
Positively charged subatomic particle nucleus +1
3
Q
Neutron
A
Neutral subatomic particle in the nucleus 0
4
Q
Electron
A
Negatively charged subatomic particle outside the nucleus -1
5
Q
Nucleus
A
Center of an atom, has protons and neutrons
6
Q
Atomic number
A
The number of protons, identifies the atom
7
Q
Mass number
A
The amount of protons and neutrons
8
Q
Group number
A
Column on the periodic table, have the same number of valence electrons
9
Q
Period
A
Row on the periodic table
10
Q
Valence electron
A
Electrons in the outermost energy shell
