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Atom’s Summary

The Atom
•
•

•
•

•
•

•

Electrons – have a
negative charge
Protons – have a
positive charge
Neutrons – have no
charge
Neutrons and
Protons together are
called NUCLEONS
All particles in a
atom are very light
...

Number of protons is
the
same
as
electrons

Particle in Atom

Mass

Charge

Proton

1

Positive +

Neutron

1

None

Electron

Almost nothing

Negative -

Periodic Table of
Elements

Groups

It is always the bigger
sized number on the
periodic table
...


• You can identify a atom
by the number of
protons in it, because
the number of protons in
a atom never changes

Periods

• Atomic number or proton
number = Number of
protons which is the same
as electrons
...

•

Nucleon or Mass
Number

Periodic Table of Elements
• Gives
names/Symbols of
elements
• Column and row
gives lots of
information on
element
...

• Like carbon, a number of elements have radioactive
isotopes or radioisotopes which occur naturally and decay
...

• More Protons than electrons = positive charge
• More electrons than protons = negative charge



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