Periodic Table And Atomic Structure Flashcards
1
Q
atom
A
The smallest unit of matter that has the same property of an element
2
Q
protons
A
Positively charged subatomic particles found in the nucleus +1 charge
3
Q
neutrons
A
Neutral subtomic particle in the nucleus no charge 0
4
Q
Electrons
A
Negatively charged subatomic particles located outside of the nucleus.
5
Q
Nucleus
A
The center of an atom and has protons and neutrons
6
Q
Atomic number
A
Number of protons ; identify 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
The rows on the periodic table
10
Q
Valent electrons
A
Electrons in the outer mass energy shell they determine reactivity
