Chemistry P2, P4, P5

Today we'll be working on different bits of the Chemistry section. Check which ones you need to do and go to the questions below:

P2:
You need to draw a graph showing how the current decreases when the length of wire increases. Use the sample graph and the results below to make your own graph.         

Current (amps)	Length of wire (cm)
2	5
1.7	15
1.4	20
.8	25
.4	30
.1	35

P4:

1. You need to name the elements in group 1 and group 7 of the periodic table.
2. You also need to write the equation for sodium and oxygen, chlorine, and water.  
3. Finally, you need to explain how the reactivity of elements changes as you move down a group.

P5:

1. Define the rate of reaction.
2. Name the factors that affect reaction rates (Temperature, concentration, surface area, catalysts)
3. Explain HOW each of the factors makes the reaction happen quicker.