BELLRINGER 9/19/18 U2 L18
Push the desks back, tear one piece of paper out of your
notebooks. Get the whole class into a circle and stand
on your piece of paper. Wait for further instruction.
Doc Cam and in pairs or three’s: write these in your
journal
We have 3 subatomic particles: ________, ________
and ________.
____________________ decides the identity of the
atom.
____________________ and ______________________
contribute to the atomic mass and the mass number
Isotopes have different numbers of ________________
but same number of _____________________
Turn and talk: What is one particle that we can change
that we haven’t talked about yet?
In pairs or 3’s, work together: Given the following
elements, put them in order of increasing atomic radius:
Fluorine
Carbon
Lead
Sodium
9/19/18 U2 L18: Isotope Real-World Applications
BELLRINGER:
Did you, when you were young/do
you now have a favorite dinosaur? If
you didn’t/don’t try to name one