Reactions & Discoveries – 50 Chemistry Questions Every American Student Should Know This 50 Science Chemistry Quiz covers atomic structure, the periodic table, chemical bonding, reactions, stoichiometry, acids and bases, thermochemistry, organic chemistry, biochemistry, and key American chemists and their discoveries. Each question includes four answer choices with the correct answer provided for self-checking.
Comment your score below after tallying your correct answers. Perfect for high school chemistry review, AP Chem prep, or classroom competitions. Share this quiz with classmates to explore the fascinating world of chemistry.
Top 50 Science Chemistry Quiz
#1. Which element has the highest electronegativity?
#2. What is the chemical formula for sulfuric acid?
#3. What is the chemical symbol for silver?
#4. What is the chemical formula for water?
#5. What is the chemical formula for table salt?
#6. What is the name of the acid in citrus fruits like lemons and oranges?
#7. What is the atomic number of carbon?
#8. What is the process by which a gas changes directly to a solid called?
#9. What is the name of the element with symbol “Pb”?
#10. What is the name of the law that states a compound always contains the same elements in the same proportion by mass?
#11. What is the name of the acid in vinegar?
#12. What is the periodic table group number for noble gases?
#13. What type of bond involves the transfer of electrons from one atom to another?
#14. What is the name of the compound NaCl?
#15. Which American chemist won the Nobel Prize for his work on heavy hydrogen (deuterium)?
#16. Which American chemist won the Nobel Prize for discovering the first transuranium element (neptunium)?
#17. What is the chemical formula for hydrochloric acid?
#18. What is the name of the element with symbol “Hg”?
#19. What is the chemical formula for carbon dioxide?
#20. Which American chemist invented the first practical process for manufacturing synthetic rubber?
#21. Which American chemist invented the first synthetic fiber (nylon)?
#22. What is the chemical formula for nitric acid?
#23. Which American chemist won the Nobel Prize for inventing the Pauling electronegativity scale?
#24. What is the pH of pure water at 25°C?
#25. Which element is the most abundant in Earth’s crust?
#26. What is the process by which a solid changes directly to a gas called?
#27. What is the name of the element with symbol “Na”?
#28. What type of bond involves the sharing of electrons?
#29. What is the chemical symbol for gold?
#30. What is the chemical formula for methane?
#31. What is the atomic number of oxygen?
#32. What is the name of the law that states mass is neither created nor destroyed in a chemical reaction?
#33. Which American chemist invented Kevlar, a high-strength synthetic fiber?
#34. Which American inventor created the first synthetic plastic (Bakelite)?
#35. Which American chemist developed the concept of the chemical bond known as the “Lewis dot structure”?
#36. What is the name of the element with the highest melting point?
#37. What is the name of the element with symbol “K”?
#38. What is the pH of a neutral solution?
#39. What is the name of the reaction where an acid and a base combine to form salt and water?
#40. What is the name of the element with atomic number 2?
#41. Which American chemist won the 2019 Nobel Prize in Chemistry for developing lithium-ion batteries?
#42. Which American chemist discovered the element plutonium?
#43. What is the pH range for acids?
#44. What is the name of the element with symbol “Fe”?
#45. What is Avogadro’s number?
#46. Which American chemist won the Nobel Prize for his work on chemical bonding and molecular orbitals?
#47. What is the chemical formula for hydrogen peroxide?
#48. What is the name of the element with atomic number 1?
#49. What is the pH range for bases (alkalis)?
#50. What is the chemical formula for ammonia?
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