Atomic Structure+ Periodic Table Flashcards
1
Q
The smallest unit of matter that has the properties of an element
A
atom
2
Q
Positively charge subatomic particle in the nucleus+1
A
proton
3
Q
Neutral subatomic particle of the nucleus
A
Neutron
4
Q
Negatively charged subatomic particle that is outside of the nucleus -1
A
Electron
5
Q
Center of an atom, has protons+neutrons
A
Neucleus
6
Q
The 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 shell. They determine reactivity.
A
Valence electrons
