CH05 – Gold Foil

Dates

• P4 – Wednesday, September 6th
• P5- Wednesday, September 6th
• P7- Wednesday, September 6th

Circle Activity

• imagine the circle as the boundries of the atom
• the diameter of the nucleus would be 5mm
• we will use a ring stand (slightly bigger) to model
• we will use baseballs (MUCH BIGGER) to model alpha particles
• How often will we hit the nucleus?
• Students assigned roles
• Let’s keep track – how often?

Regroup

• Thoughts?
• Matter is mostly?

Atomic Particles & PT

• protons / neutrons / electrons
• mass number = A (sum of protons and nuetrons)
• atomic number = Z (number of protons)
• charge = Q (difference between protons and electrons)
• table of organizing (worksheet in Drive)

Homework

• Finish Worksheet (Atomic Particles)
• Ch. 2 (67)