atomic theory timeline 4 Flashcards
1
Q
negatively charged atomic particles
A
electrons
2
Q
at the center of all atoms is the
A
nucleus
3
Q
positively charged atomic particles
A
protons
4
Q
uncharged (positive) atomic particles
A
neutrons
5
Q
the atomic number is equal to the number of
A
protons in the nucleus of an atom
6
Q
the atomic number identifies
A
the element
7
Q
the total number of protons and neutrons
A
mass number
8
Q
the subatomic particles are measured in
A
AMU’s
9
Q
AMU
A
atomic mass unit
10
Q
every proton and neutron have a mass of
A
1 AMU
