15 questions · 20 seconds each · Speed bonus scoring
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Covers classifying substances by structure, melting and boiling point trends across the five categories, conductivity by state, why graphite conducts but diamond does not, polarity and solubility, and substitutional vs. interstitial alloys
15
Questions
20s
Per question
1000
Max points
Tip: you can answer with the keys 1–4 or A–D, and press Enter to move on.
Answering faster scores more — but a wrong fast answer is still worth nothing.
Remember the three questions: what are the particles, what holds them together, and is
anything charged AND free to move? Several questions are designed to catch you answering "it's ionic, so it
conducts" without checking the state.
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Want to review before another go? Head back to the
interactive tools for the lattice viewer, the
conductivity simulator and the alloy mixer, or the
applications page for pencils, alloys and
electrolytes.