HKU SPACE Community College
Foundations of Chemistry
1
,Atomic Structure
2
, Why Atomic Structure Important ?
• We can understand:
- different kinds of bonding between atoms
- the characteristic physical and chemical
properties of substances.
( physical properties: colour, m.p.,
b.p.,appearance
chemical properties: pH, reaction rate)
3
, Atoms: made up of 3 types of particles
electrons , protons and neutrons .
Electrons
- tiny, very light particles
- negative electrical charge (-).
Protons
- much larger and heavier than electrons
- opposite charge, a positive charge (+).
Neutrons
- large and heavy like protons 4
- no electrical charge.
Foundations of Chemistry
1
,Atomic Structure
2
, Why Atomic Structure Important ?
• We can understand:
- different kinds of bonding between atoms
- the characteristic physical and chemical
properties of substances.
( physical properties: colour, m.p.,
b.p.,appearance
chemical properties: pH, reaction rate)
3
, Atoms: made up of 3 types of particles
electrons , protons and neutrons .
Electrons
- tiny, very light particles
- negative electrical charge (-).
Protons
- much larger and heavier than electrons
- opposite charge, a positive charge (+).
Neutrons
- large and heavy like protons 4
- no electrical charge.
