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
A positively charge subatomic particle in the nucleus (+1)
3
Q
Neutron
A
Neutral subatomic particle in the nucleus (0)
4
Q
Electron
A
Negatively charge subatomic particle outside nucleus (-1)
5
Q
Nucleus
A
Center of an atom has protons and neutrons
6
Q
Atomic numbers
A
Number of protons in an atom, identify the 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
Rows on the periodic table
10
Q
Valence electrons
A
Electrons in the outermost energy cell. They determine reactivity.
