atomic structure 3.2 Flashcards
1
Q
what’s the relative mass and charge of a proton?
A
1mass
+1 charge
2
Q
what the relative mass and charge of a neutron?
A
1 mass
0 charge
3
Q
what’s the relative mass and charge of electrons?
A
0.0005 mass
-1 charge
4
Q
what’s the atomic number?
A
number of protons
5
Q
what’s the mass number?
A
total number of protons and neutrons
6
Q
what’s the top number tell us?
A
mass number
7
Q
what’s the bottom number?
A
atomic number
8
Q
what are isotopes?
A
atoms with same number of protons but different numbers of neutrons
9
Q
how do you work out the relative atomic mass?
A
(% abundance x mass) + (% abundance x mass)
10
Q
what does a row tell you?
A
period - number of occupied shells
11
Q
what does a column tell you?
A
group - number of electrons in the outer shell
12
Q
what are the shells called?
A
energy levels
13
Q
A
