1. In your own words, define/explain what ionization and vapourization are with respect to mass spectrometry. (2 marks)

2. Name one of the ionization methods discussed and explain, in your own words, how it works and what's involved. (4 marks)

1. An LD50 value is the best measure available to indicate the potential for a compound to cause harm, to be toxic. However, there are six limitations that we looked at and explained. Below, using your own words, name each of these limitations and explain in detail (and with an example/scenario if possible) why it’s a limitation.

1. What are the limitations of your model in explaining fusion?

2. How will you now adjust your model to more accurately represent the process of fusion that is happening in our Sun?

Answer the following question:

1. In your own words, explain why, if two compounds have the same LD50 value, they aren’t necessarily as toxic. Make sure to include the term Threshold in your answer.