Do Now & Announcements Take out note packet from yesterday

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Solving atomic calculations: Working with: – Elements – Isotopes – Ions – Atomic # – Atomic mass – Charge.

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Presentation transcript:

Do Now & Announcements Take out note packet from yesterday Today: Structure of the Atom Webquest and Timeline due WED 11/4

A Closer Look at the Atom Answer questions based on simulation: http://phet.colorado.edu/en/simulation/bui ld-an-atom

How do you figure out the number of: Protons in an atom? # protons = the atomic number Electrons in an atom? # electrons = # protons FOR NEUTRAL ATOMS, only! Neutrons in an atom? # neutrons = mass – # protons

What are Isotopes? Isotopes are different forms of the same element that have a different mass Isotopes have the same # protons but different # neutrons

What are Ions? Ions are atoms that have a positive or negative charge Ions have an unequal number of protons and electrons

Standard Nuclear Notation Note: for ions, the charge (+ or -) is indicated in the upper right corner