|
|
Anything around us that has mass and occupies volume is known as matter. Matter is made up of tiny particles called atoms. Atoms join together to form molecules.
Atoms are made up of three fundamental particles: neutrons, protons, and electrons.
According to Rutherford’s model of the atom, there is a dense, positively charged nucleus, in which all the mass is concentrated, surrounded by a region of negatively charged electrons.
Review Questions
a)
Define
matter?
b)
What are
the three states of matter?
c)
What is
matter made up of?
d)
Draw a
simple model of an atom
e)
Complete
the following table
|
Sub
Atomic Particle |
Location |
Mass |
Charge |
|
Neutron |
|
|
|
|
Proton |
|
|
|
|
Electron |
|
|
|
f) State the law of electrostatics.
g)
What do we mean by difference in potential?
h)
State the
difference between Conductors & Insulators
i)
Define
and give the proper Symbol and Short form for the following terms
VOLTAGE, CURRENT, RESISTANCE
j)
What are
the four factors that determine the resistance of a conductor (or a material)?
k)
What are
the units of electric current?
l)
What are
the units of electric voltage?
|