The Structure of an Atom
Label the diagram of an atom with the following words: Electron, Orbit, Proton,
Neutron, and Nucleus.
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Fill in the missing words in the sentences below:
 The subatomic particles which make up atoms are called
and

called the
,
.
and
are contained in the centre of the atom, which is
.

orbit around the

are positively charged,
.
are negatively charged and
are neutral.
Answer the following questions:
1. How is the atomic number of an element determined?
2. If an atom is neutral, what does that say about the subatomic particles in the atom?
What does the picture below show?
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 How many protons does the atom have? _______________
 How many neutrons does the atom have? _______________
 How many electrons does the atom have? _______________
 What is the atomic number of this atom? _______________
 What is the name of this atom? _______________
 What is the symbol for this atom? _______________
 Is this a neutral atom? Explain your choice.
In the space below, draw an atom with 5 protons, 6 neutrons and 2 electrons.
 What is the atomic number of this atom? _______________
 What is the name of this atom? _______________
 What is the symbol for this atom? _______________
 Is this a neutral atom? Explain your choice.