Atomic Structer + Periodic Table Flashcards
1
Q
Atom
A
Smallest unit of matter that has the properties of an element
2
Q
Proton +1
A
Positively charged sub atomic particle in the nucleus
3
Q
Neutron
A
Neutral subatomic particle in the nucleus
4
Q
Electron
A
Negatively charged subatomic particle outside of the nucleus
5
Q
Nucleus
A
Center of an atom, has protons + neutrons
6
Q
Atomic numbers
A
The number of protons,identifies on a 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 electrons
A
Electrons in the outermost energy shell. They determine reactivity
