Atomic Structure + Periodic Table Flashcards
1
Q
Atom
A
Smallest unit of matter that has the same properties of an element
2
Q
Protons
A
Positively charged subatomic particle in the nucleus (+1)
3
Q
Neutrons
A
Neutral subatomic particle in the nucleus (0)
4
Q
Electrons
A
Negatively charged subatomic particle in the nucleus (-1)
5
Q
Nucleus
A
Center of an atom, has protons + neutrons
6
Q
Atomic number
A
Number of protons, identifies an atom
7
Q
Group
A
Column on the periodic table, has the same number of valence electrons
8
Q
Period
A
Row on the periodic table
9
Q
Valence electron
A
Electrons in the outermost energy shell, they determine reactivity
10
Q
Mass number
A
Number of protons + number of neutrons
