Atomic Structure
1
Compounds
Atoms, molecules and compounds
Atoms, molecules and compounds
3
All molecules are not
compounds. All compounds are
molecules.
4
Atoms, molecules and compounds
5
2
Atomic number &
mass number
Determining atomic number (Z) & mass number
(A)
⦿Z = atomic number = number
of protons in the nucleus
⦿A = mass number = number of
protons and neutrons
together.
7
Atoms, molecules and compounds
p
Hydrogen
1
Fluorine (F)
9
Beryllium (Be)
4
Calcium
(Ca2+)
e
n
A
Z
2
4
38
8
3
Nuclear Symbol
Notation
Determining protons, neutrons and electrons in
atoms, ions and isotopes
Standard nuclear notation
shows the chemical symbol, the
mass number and the atomic
number of the isotope.
10
Nuclear Notation
11
Nuclear Notation
12
Nuclear Notation
13
Nuclear Notation
14
Nuclear Notation
15
What can
nuclear notation
tell us?
16