Download What is an Atom?

What is an atom?
• An atom is the smallest whole
particle of matter.
• How small is an atom?
• If I had one piece of paper….
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• If I could cut the paper in half about 90
times, I would have a piece around the size
of the atom.
90
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• About a million atoms stacked on top of
each other = the thickness of a sheet of
paper.
Copyright © 2010 Ryan P. Murphy
• About 5 million atoms make up a period at
the end of a sentence.
Copyright © 2010 Ryan P. Murphy
Scanning Tunneling Microscope
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Nucleus
Neutron
Proton
Electron
Nucleus
Atomic Number
Atomic Symbol
Name
Atomic Mass
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Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright © 2010 Ryan P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright
© 2010
Ryan
P. Murphy
Copyright
© 2010
Ryan
P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright
© 2010
Ryan
P. Murphy
Copyright
© 2010
Ryan
P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright © 2010 Ryan P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright © 2010 Ryan P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright © 2010 Ryan P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright © 2010 Ryan P. Murphy
Atomic Number
Atomic Symbol
Name
Atomic Mass
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol?
• What is the atomic
number?
– How many Protons?
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number?
– How many Protons?
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number?
– How many Protons?
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons?
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons?
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons?
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass?
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass? 19 amu
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass? 19 amu
– How many Neutrons?
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass? 19 amu
– How many Neutrons?
19
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass? 19 amu
– How many Neutrons?
19 -
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass? 19 amu
– How many Neutrons?
19 - 9
Copyright © 2010 Ryan P. Murphy
• What is the atomic
symbol? F
• What is the atomic
number? 9
– How many Protons? 9
– How many Electrons? 9
• What is the atomic
Mass? 19 amu
– How many Neutrons?
19 - 9 = 10
Copyright © 2010 Ryan P. Murphy