SubjectPaid lesson
Particulate nature of matter
CT
ClassNotes Team 5 MIN READUPDATED 5 JUL 2026CHEMISTRY SSS1 First Term
WEEK 8
Particulate nature of matter
Performance Objectives
The student should be able to:
- Define physical and chemical changes with examples.
- Define atoms and molecules.
- State Dalton’s atomic theory.
Content
Physical and chemical changes
Physical changes
A physical change is when matter changes form but not chemical identity. A Material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced.
Examples of Physical Changes
No new chemical species forms in a physical change. Changing the state of a pure substance between solid, liquid, and gas phases of matter are all physical changes since the identity of the matter does not change.
Crumpling a sheet of…