What the Heck is an Atom, Anyways

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What the Heck is an Atom, Anyways?

• Science 9

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What do you KNOW about Atoms from Middle School?
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WHAT Did we learn from previous research?

• Rutherfordgold foil experiment
• -positive nucleus, mass is there!
• Chadwick
• -neutrons in the nucleus, have mass!
• Thompsoncathode rays experiment
• -electrons have a negative charge
• THIS Knowledge was used to build our current
  atomic model.

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What does an Atom Look Like?
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What do we Know about the Nature of the Atom?

• The mass of the atom is located in the nucleus.
• Protons (p) and Neutrons (n0)have mass.
• The electrons (e-), located in the electron
  cloud, have NO MASS. They hang around
• Because they are attracted to the p.

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How Does this relate to the Periodic Table?

• Atomic Number 5
• Atomic number is equal to
• protons in the nucleus
• electrons in the cloud
• Mass 11
• Mass Number protons neutrons in the
• nucleus