Atomic Structure & Periodic Table Vocab Flashcards
1
Q
Atom
A
The smallest unit of matter, that has the same properties as the elements
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 outside of the nucleus
5
Q
Nucleus
A
Center of the atom, has protons and neutrons
6
Q
Atomic Number
A
Number of protons, identifies an atom
7
Q
Mass number
A
Number of protons and number of 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 electrons
A
Electrons in the outermost energy shell. They determine reactivity
