Long answer·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A student says, "Actinoids are just heavier lanthanoids, so their chemistry is exactly the same." Evaluate this statement using three points.
Total: 3 marks
(a) State one similarity. (1 mark)
(b) State one difference in oxidation states. (1 mark)
(c) State one difference involving radioactivity or orbital participation. (1 mark)
Something wrong with this item?