Assignment 3 2025
Unique number:
Due Date: 31 July 2025
QUESTION 1
1.1 Define the following
a. Particle:
A particle is a tiny piece of matter. It can be something very small like a grain of dust or even
smaller, like an atom or part of an atom. In science, we use the word particle to talk about
objects that have properties such as mass and volume, even if they are too small to see. In
some subjects like chemistry, particles can mean atoms or molecules. In physics, they can
also mean smaller things like electrons.
b. Atomic model:
An atomic model is a drawing or idea that helps us understand what an atom looks like and
how it works. Scientists use these models to explain how atoms are built and how they
behave. There are different models that were made over time, such as Dalton’s solid sphere
model, Thomson’s plum pudding model, Rutherford’s nuclear model, Bohr’s model
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