1. Inside the Atom -1 Particle Mass Charge Position Proton Neutron
1) Complete the table;
Particle
Mass
Charge
Position
Proton
Neutron
nucleus
Electron -1
2) Fill in the missing words; ( negative positive neutral protons neutrons electrons ions alpha beta gamma cytoplasm nucleus )
The ________ of an atom contains ________ and ________. It has a ________ charge. ________ orbit around the nucleus – they have a ________ charge. The amounts of positive and negative charge balance in an atom so they are ________. Charged particles contain either more protons or more electrons. For example ________ radiation consists of positively charged ________.
3) What is each description?
a) Smaller than an atom; neutral
b) Also called a beta particle
c) Two protons and two neutrons
d) Particles free to move throughout a metal
e) Very high energy EM radiation
4) Rutherford’s experiment
What radiation did Rutherford direct at the foil?
From what metal was the foil made?
What happened to most of the radiation?
What happened to some of the radiation?
What does your answer to (d) tell you about the structure of the atom?
5) Extension
Draw an alpha scattering diagram
Describe the plum pudding model