Science Vocab Flashcards
1
Q
The smallest unit of matter that has the properties of an element
A
Atom
2
Q
Positively charged subatomic particles in the nucleus
A
Proton
3
Q
Neutral subatomic particles in the nucleus
A
Neutron
4
Q
Negativity chard subatomic particles outside of the nucleus
A
Electron
5
Q
Center of an atom has protons and neutrons
A
Nucleus
6
Q
The number of protons identifies
A
Atomic number
7
Q
The number of protons plus neutrons
A
Mass number
8
Q
Column on the periodic table have the same number of valence electrons
A
Group number
9
Q
A row on the periodic table
A
Period
10
Q
Electrons in the outermost energy shell they determine reactivity
A
Valence electron
