Athanor by arbastro
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Question types

Each problem has an Answer type, such as Draw structures, Mechanism arrows, Number, Multiple choice, Retrosynthesis or Spectrum interpretation. Drawn answers are graded on structure, with settings for stereochemistry, charges and partial credit.

Select a problem on Build and pick its Answer type in the panel on the right.

The Answer type list, starting with Draw structures, Mechanism arrows, Number and Multiple choice.The Answer type list, starting with Draw structures, Mechanism arrows, Number and Multiple choice.

Group Answer types
Chemistry Draw structures, Mechanism arrows, Retrosynthesis, Spectrum interpretation, Expression
Numbers and words Number, Short answer, Fill in the blanks, Dropdowns in a sentence, Data entry
Choosing Multiple choice, True or false, Matching, Sort into groups, Put in order, Venn diagram, Label a diagram
Biology Punnett square, Pedigree, Gel lanes, Sequence strip

Grading drawn answers

For Draw structures, the Grading settings say what must match and what earns partial credit:

Grading: Stereochemistry must match, Charges and lone pairs must match, and the partial credit choices.Grading: Stereochemistry must match, Charges and lone pairs must match, and the partial credit choices.

  • Stereochemistry must match and Charges and lone pairs must match.
  • Right structure, wrong stereochemistry earns, for example 50% of the points.
  • Right formula, wrong connections earns, for example nothing.

Each problem also has Points, Tries, Variables, a Hint, an Explanation and Feedback for specific wrong answers. For mechanism problems from templates, see Mechanism problem templates.

TeachingHow to create a problem setChoose File › New problem set and pick where the problems come from: From your textbook, From a template, or Write your own. Set the number, difficulty and level, then review and assign.MechanismsMechanism problem templates (SN1, SN2, E1, E2)Choose File › New problem set › From a template › Organic chemistry and tick the mechanism templates, such as SN1 mechanism, SN1 with a hydride shift, E1 mechanism or E2 mechanism. Set how many, the difficulty and the level, then Pick templates.

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Last updated Nov 12, 2026