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Basic Chemistry

Subjects : science, chemistry
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Atoms that have lost or gained electrons






2. Atoms having the same numbers of protons but different numbers of neutrons






3. A covalent bond in which four valence electrons are shared between two atoms






4. Subatomic particle having a positive charge; found in nucleus






5. Substance made of two or more elements & none of which is carbon






6. A covalent bond in which one pair of electrons is shared






7. An unstable atom in which the nucleus decays (breaks down) releasing particles and energy






8. Interaction of substances that lead to the formation of new substances






9. Indicates the number and types of atoms in a molecule






10. A covalent bond in which one pair of electrons is shared






11. The smallest particle of an element that retains the properties of the element






12. Protons and neutrons together; make up the center of an atom






13. Substance made of two or more elements & none of which is carbon






14. Atoms that are held together by covalent bonds






15. Subatomic particle having a negative charge; not in nucleus but surrounds it






16. Occurs when atoms transfer electrons to other atoms






17. Electrons in the outermost energy level; they are involved in bond formation






18. The starting materials for a reaction; found on left side of chemical equation






19. Occurs when atoms share electrons






20. Subatomic particle having a negative charge; not in nucleus but surrounds it






21. Subatomic particle without a charge; found in nucleus






22. An unstable atom in which the nucleus decays (breaks down) releasing particles and energy






23. Substance made of two or more elements & one being carbon






24. Subatomic particle without a charge; found in nucleus






25. Anything that occupies space and has mass






26. Substance containing two or more elements chemically combined in a fixed ratio






27. Substance made of two or more elements & one being carbon






28. Substance containing two or more elements chemically combined in a fixed ratio






29. Anything that occupies space and has mass






30. Indicates the formation of new substances from previous substances






31. A pure substance that cannot be broken down into other substances by chemical reactions






32. Subatomic particle having a positive charge; found in nucleus






33. Protons and neutrons together; make up the center of an atom






34. Shows the number and types of atoms in a molecule and how they are arranged






35. Occurs when atoms transfer electrons to other atoms






36. Atoms that have lost or gained electrons






37. Indicates the formation of new substances from previous substances






38. Occurs when atoms share electrons






39. Identifies a specific element; equals the number of protons in an atom of each element






40. A covalent bond in which four valence electrons are shared between two atoms






41. Atoms that are held together by covalent bonds






42. Electrons in the outermost energy level; they are involved in bond formation






43. Ending materials of a reaction; found on right side of chemical equation






44. Interaction of substances that lead to the formation of new substances






45. Shows the number and types of atoms in a molecule and how they are arranged






46. The starting materials for a reaction; found on left side of chemical equation






47. A pure substance that cannot be broken down into other substances by chemical reactions






48. Identifies a specific element; equals the number of protons in an atom of each element






49. The smallest particle of an element that retains the properties of the element






50. Indicates the number and types of atoms in a molecule