Atoms Periodic Table

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					Atoms & Periodic Table
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                Atom

The smallest particle of an element that has
the chemical properties of the element.

Atoms are made of three smaller units known
as subatomic particles: protons, neutrons, &
electrons.
   Subatomic Particles

Particle   Charge          Location

Proton     Positive      In the nucleus

Neutron    Neutral       In the nucleus
           (no charge)

                         Found orbiting
Electron   Negative
                          the nucleus
Bohr’s Model
             Atoms


All atoms of the same element have the
same number of protons.

Atoms of the same element that have the
same number of protons but different
number neutrons are called ISOTOPES.
Key to Periodic element

 Atomic Number - # of protons

 Element Symbol - shorten version of name

 Element Name - what we call the element

 Atomic Mass - mass of protons & neutrons

 (see board diagram)
    Physical Science


Read pages 115-122

Answer Section Review Qs 1-4 p. 120

Answer Section Review Qs 1-5 p. 123