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All quizzes
Every published quiz on ThreeRoads.
- MF
MCU films in in-universe chronological order (Infinity Saga start to Endgame)
Step through the MCU films in their in‑universe chronological order from the earliest Infinity Saga events up to Endgame — pick the next film in the timeline.
12 Q0 takes - EE
Element eponyms and honorees among 101–118
For each element (101–118) shown, name the person, place, or institution the element was officially named after (use canonical names or common short forms).
9 Q0 takes - SA
Symbols and atomic numbers: 101–118 symbol recall
Given an atomic number (101–118), provide the official chemical symbol and element name.
12 Q0 takes - ON
Official naming rationales for elements 101–118
For each element (101–118), select the official IUPAC naming rationale (person, place/organization, mythological/ancient term, or property/characteristic) cited when the element name was adopted.
12 Q0 takes - SG
Symbols-only: give symbols for 91–100
Select the correct chemical symbol for each element with atomic numbers 91–100.
10 Q0 takes - E9
Elements 91–100: early actinides and fermium region names
Name each element by its official IUPAC name for atomic numbers 91 through 100.
10 Q0 takes - IE
Identify elements 81–90 by name
Given atomic numbers 81–90, name each element by its official English name (one answer per atomic number).
10 Q0 takes - O(
Osmium (Os) — dense metal, compounds and safety
Ten questions on osmium (Z=76): its physical properties, common compounds (especially osmium tetroxide), uses, and safety/toxicity.
10 Q0 takes - T(
Tungsten (W) — high-melting metal and industrial chemistry
Ten questions on tungsten (Z=74): melting point, common oxidation states, key compounds (oxides, halides, carbides), historical filament use, alloys, and ore sources.
10 Q0 takes - L(
Lutetium (Lu) — properties, compounds and uses
Ten multiple-choice questions on lutetium (Z=71): atomic facts, chemistry, discovery, compounds, and principal uses.
10 Q0 takes - E(
Erbium (Er) — telecommunications and doping in fibers
Ten multiple-choice questions about erbium's role in fiber-optic amplification: atomic properties, why Er3+ is used, host materials, pump and emission wavelengths, and related concepts.
10 Q0 takes - D(
Dysprosium (Dy) — high-temperature magnets and nuclear capture
Ten short-answer questions about dysprosium's basic properties, roles in high-temperature magnets, isotopes, and coordination chemistry.
10 Q0 takes - N(
Neodymium (Nd) — magnets, alloys and spectral lines
Test your knowledge of neodymium: atomic facts, chemistry, spectral/laser roles, and major industrial uses.
11 Q0 takes - X(
Xenon (Xe) — noble gas compounds and applications
Ten questions on xenon's discovery, common compounds and oxidation states, and its major applications in lighting, anesthesia, and propulsion.
10 Q0 takes - I(
Iodine (I) — halogen behavior and biological roles
Ten multiple-choice questions on iodine's oxidation states, common compounds, biological roles, medical uses, and principal industrial production methods.
10 Q0 takes - T(
Tellurium (Te) — chalcogen chemistry in the heavy p‑block
Ten multiple-choice questions on tellurium: its oxidation states, common compounds, semiconductor uses, mineral occurrences, and name origin.
10 Q0 takes - I(
Indium (In) — electronics, alloys, and common compounds
Ten multiple-choice questions on indium's properties, ores, alloys, and industrial uses.
10 Q0 takes - S(
Silver (Ag) — compounds, conductivity, and photographic history
Ten multiple-choice questions about silver: its symbol, properties, important compounds, photographic uses, and common ores.
10 Q0 takes - T(
Technetium (Tc) — isotopes, medical uses, and discovery
Ten focused multiple-choice questions on technetium (Tc): its symbol, discovery, lack of stable isotopes, key radioisotopes (especially Tc-99m), production routes, decay modes, and medical imaging uses.
10 Q0 takes - NO
Name Origins: Etymology for 31–40
Give the origin (person, place, property, or language root) of the name for each element with atomic number 31–40.
10 Q0 takes - S3
Symbols-to-Names: 31–40 Challenge
Given a chemical symbol from atomic numbers 31–40, supply the full element name (e.g., 'Ge' → 'germanium').
10 Q0 takes - GT
Gallium through Zirconium: Name-to-Symbol Rapid Recognition
Given an element name (atomic numbers 31–40), enter the correct one- or two-letter chemical symbol. Answers are case-insensitive; common variants are accepted.
10 Q0 takes - SA
Symbols, Atomic Numbers, and Period/Group Positions (Sc–Zn)
Identify atomic numbers, group numbers, or period positions for the elements with atomic numbers 21–30 (Sc–Zn).
10 Q0 takes - TI
Typical Ionic Forms and Common Ions (Sc–Zn)
Give the canonical ionic form(s) and commonly encountered cation(s) for each element Sc → Zn (e.g., oxidation-state ionic notation like Fe2+).
10 Q0 takes