Relative atomic mass from two isotopes
A chlorine-like sample in a school spectroscopy trial has isotope masses \(35\) and \(37\) with abundances \(83\%\) and \(17\%\). Calculate the relative atomic mass. 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.