Atoms Worksheet

Worksheet 4:   Atoms                   Name:________________________

A route is given at the start of a set of activities. This is to help you find the answers. Try the route below :

Solar Fact
files 		Solar Light
Tour 		Atoms

Complete these sentences:

1. A lithium atom has ______ protons, _______ neutrons and ______ electrons.

2. _________ is the name of the process when a nucleus is split.

3. A ________ and a _________ have the same mass.

4. An ion is an atom which has lost one or more __________.

5. An ion has a __________ charge.

6. A gas that contains ions is called a ___________.

7. Complete the table below.
PARTICLE CHARGE
Proton ?
? None
? Negative

Now try this route to answer the next question.
Solar Fact
files 		Solar Energy
Chains 		Core

8. When nuclei of hydrogen atoms stick together in the Sun's core to form helium,
this is called _________.