Atomic Structue And Periodic Table Vocab 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
3
Q
Neutrons
A
Neutral subatomic particle in the nucleus
4
Q
Electrons
A
Negatively charged subatomic particle outside of the nucleus
5
Q
Nucleus
A
Center of an 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 neutrons
8
Q
Group
A
Column on the periodic table, haas 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.
