Atomic Structure And Periodic Table Flashcards
1
Q
Atom
A
The smallest unit of matter that has the properties of an element.
2
Q
Proton
A
A positively charged subatomic particle in the nucleus.
3
Q
Neutron
A
Neutral subatomic particle in the nucleus.
4
Q
Electron
A
Negatively charged subatomic particle outside the nucleus.
5
Q
Nucleus
A
Center of an atom, has protons and neutrons.
6
Q
Atomic Number
A
Number of protons an atom and identifies the atom.
7
Q
Mass Number
A
The number of protons and neutrons.
8
Q
Group
A
Colum on the periodic table has the same number of valence electrons
9
Q
Period
A
The rows on the periodic table.
10
Q
Valence Electrons
A
The electrons in the outermost energy shell, they determined reactivity
