Atom Vocab Flashcards
1
Q
Atom
A
The smallest of matter that has the properties of an element
2
Q
Proton
A
Postitvely charged sub atomic particle in the nucleus +1
3
Q
Neutron
A
Neutral subatomic particle found in the necleous 0
4
Q
Electron
A
Negativity charged subatomic particle outside of the necleous -1
5
Q
Nucleus
A
Is the center of a atom has protons and neutrons
6
Q
Atomic number
A
the number of protons in the necleous that identifies an atom
7
Q
Mass number
A
The number of protons plus neutrons in the nucleus
8
Q
Group number
A
Column on the periodic table that have the same number of valence electrons. They are grouped together
9
Q
a row on the periodic table
A
Period
10
Q
Valence electron
A
Electrons in the outermost energy shell
