Atomic Structure + Peiodic Table Vocab. Flashcards
1
Q
Atom
A
Smallest unit of matter that has the same properties of an element.
2
Q
Proton
A
Positively charged subatomic particle in the nucleus (+1).
3
Q
Neutrons
A
Neutral subatomic particle in the nucleus (0).
4
Q
Electrons
A
Negativity charged subatomic particle outside of the nucleus (-1).
5
Q
Nucleus
A
Center of an atom,has protons + neutrons.
6
Q
Atomic number
A
The number of protons.
7
Q
Mass number
A
The number of protons + the number of neutron.
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 determines reactivity.
