Quizzes · Knowledge
Gold (Au) — atomic facts, compounds and bullion history: Multiple Choice
Preview · 12 questions
- 01Which cyanide complex is central to modern gold extraction (cyanidation) chemistry?
- 02Which pair of oxidation states are the most common for gold in compounds?
- 03What is the standard atomic weight of gold (approximate average atomic mass)?
- 04Which compound is gold(III) chloride commonly written as?
- 05Which electron configuration correctly represents a neutral gold atom (ground state)?
- 06In jewelry, what purity (karat) corresponds to 75% gold by mass?
- 07What is the approximate melting point of gold in degrees Celsius?
- 08Which reagent/process is commonly used industrially to purify gold by converting impurities into chlorides (used in smelting)?
- 09Which electrochemical refining process produces very high-purity gold (often >99.99%)?
- 10Which process historically established national monetary systems by fixing currency values to gold?
- 11What is the approximate density of gold at room temperature (g/cm3)?
- 12What is the atomic number of gold (Au)?