atomic structure 3.2 Flashcards
1
Q
proton mass
A
1
2
Q
proton charge
A
+1
3
Q
neutron mass
A
1
4
Q
neutron charge
A
0
5
Q
electron mass
A
0.0005
6
Q
electron charge
A
-1
7
Q
what does the atomic number show
A
the number of protons
8
Q
what does the mass number show
A
number of protons and neutrons
9
Q
what is an isotope
A
atoms with the same number of protons but a different number of neutrons
10
Q
what is the RAM
A
the average mass of an atom of an element
11
Q
how is RAM calculated
A
each mass number multiplied by % abundance, added together / 100
12
Q
each period
A
number of shells
13
Q
each group
A
number of electrons on the outer shell
