STEM EVIDENCE WORKBENCH
Compare classic atomic observations with bounded model inferences while keeping evidence, learner claims, and historical limitations separate.
Review output
Load the worked example to inspect realistic inputs, or enter anonymous classroom or laboratory evidence. Results remain in this browser tab until you copy or download them.
Transparent method
This is a categorical evidence audit rather than a numerical formula. For each row, normalized learner and verified inference codes are compared exactly. Counts summarize matched links and distinct evidence types, while the complete observation text remains visible so no result is detached from its supplied experimental context. A match means the learner claim agrees with the verified bounded link entered for that row. It does not mean the observation uniquely proves the entire model. A mismatch should lead to source review, apparatus diagrams, alternative historical models, and an explanation of what the evidence ruled out or left unresolved.
Confirm the prompt, source values, units, signs, notation, precision, and model required by the current course. Keep an untouched copy of observations or responses before changing a row.
Run the worked example first, inspect every intermediate row, and compare the table with a hand calculation, diagram, graph, periodic table, or approved laboratory method.
Record the method, assumptions, units, rounding, limits, and any row that needs review. Use the exported report as editable evidence and verify it independently before assessment or laboratory use.
How to interpret the result
Use when learners compare how cathode-ray, scattering, line-spectrum, and neutron evidence constrained successive atomic models. The workbench checks one supplied observation-to-inference link at a time. It does not reproduce experiments, rank historical credit, derive a modern quantum model, or prove all atomic features from one observation.
Cathode-ray deflection is linked with electron evidence. Most alpha particles passing through foil supports mostly empty space, while rare sharp rebounds support a compact positive nucleus. Discrete spectra are linked with quantized energy levels. The example intentionally mismatches two learner claims so discussion can separate nuclear evidence from older uniform-sphere ideas.
This is a categorical evidence audit rather than a numerical formula. For each row, normalized learner and verified inference codes are compared exactly. Counts summarize matched links and distinct evidence types, while the complete observation text remains visible so no result is detached from its supplied experimental context.
A match means the learner claim agrees with the verified bounded link entered for that row. It does not mean the observation uniquely proves the entire model. A mismatch should lead to source review, apparatus diagrams, alternative historical models, and an explanation of what the evidence ruled out or left unresolved.
Do not collapse all scattering evidence into one claim, say atoms are literally empty without discussing scale and fields, infer fixed planetary electron paths from spectra alone, or present model history as a simple replacement sequence. Verify terminology and keep observation separate from interpretation.
Learning boundary
This browser-local workbench applies only the disclosed rules to entered values. It cannot diagnose learning, certify an experiment, establish a chemical fact, reconstruct missing evidence, or replace the method and judgment required by a teacher, curriculum, laboratory, or institution.
Review checklist
Practical questions
No. Processing occurs in the current browser tab. Avoid names and other personal information, and retain authoritative records only in the system approved by the school.
No. A matched pattern describes the entered evidence under one disclosed rule. Ask for an explanation and review several evidence sources before deciding the next step.
Treat it as an editable calculation aid. Show your own reasoning, use the method requested by the course, cite required sources, and follow the applicable academic-integrity rules.
YOUR NIRMION
