Ionization energy increases across a period
Across a period in a Auckland water-testing lesson, first ionization energy changes from \(520\,\text{kJ mol}^{-1}\) to \(970\,\text{kJ mol}^{-1}\). Calculate the increase. Read the diagram labels first, then answer with the classification or value. Enter the answer and choose the interpretation that matches the chemistry.
Worked practice: chemistry evidence and answer
Use the chemical evidence first, then enter the result and interpretation that match it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.