Atomic Structure+ Periodic Table Flashcards
1
Q
Atom
A
The smallest unit of matter that has the properties of an element
2
Q
Proton
A
Positively charged subatomic particles in the nucleus(+1)
3
Q
Neutron
A
Neutral subatomic particle in the nucleus(0)
4
Q
Electron
A
Negatively charged subatomic particle outside the nucleus(-1)
5
Q
Nucleus
A
Center of an atom, has protons+nuetrons
6
Q
Atomic Number
A
Number of protons, identifies an atom
7
Q
Mass Number
A
Number of Protons+Nuetrons
8
Q
Group
A
A column in the periodic table, has the same number of valence electrons
9
Q
Period
A
Row on the periodic table
10
Q
Valence Electrons
A
Electrons in the outermost energy shell. They determine reactivity.
