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SubjectPaid lesson

Molecular theory of matter

ClassNotes Team 4 MIN READUPDATED 6 JUL 2026

 Physics SSS2 Third Term

Sub Theme: Waves Motion without Material Transfer

WEEK 9

Molecular theory of matter

Performance Objectives

Students should be able to;

  1. State the fundamental assumptions the molecular theory. 
  2. Use the molecular model to explain pressure in a gas, cohesion and adhesion and diffusion.

Fundamental assumptions of molecular theory.

Content

The molecular theory of matter assumes that matter is made up of atoms that aggregate in molecules.

The atom is the smallest particle of an element that can have a separate existence and still retain the chemical properties of that element.

The molecule 1s a group or atoms or the same or different elements joined together in a simple proportion.

The size of the molecule is of…