Atomic Structure + Periodic Table Vocab Flashcards
1
Q
Atom
A
the smallest unit of matter that has the properties of an element
2
Q
Proton
A
positively charged subatomic particle in the nucleus (+1)
3
Q
Neutron
A
neutral Subatomie particle in the nucleus (o)
4
Q
Electron
A
negatively charged subatomic particle outside the nucleus (-1)
5
Q
Nucleus
A
center of an atom, has protons and neutrons
6
Q
Atomic number
A
number of protons in an atom, identifies the atom
7
Q
Mass number
A
the number proton + neutrons
8
Q
Group
A
coulum on the veriodic table, has the same number of valence electros
9
Q
Period
A
row on the periodic table
10
Q
valence electrons
A
electrons in the outermost energy shell. They determine reactivity.
