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 sub particle in the nucleus.
3
Q
Neutron
A
Neutral subatomic particle in the nucleus.
4
Q
Electron
A
Negative charge subatomic particle outside of the nucleus.
5
Q
Nucleus
A
Center of an atom has protons and neutrons.
6
Q
Atomic number
A
Number of protons in an atom, identifies an atom.
7
Q
Mass number
A
The total number of protons and neutrons.
8
Q
Group
A
Column on the periodic table has 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, they determine reactivity.
