Test your basic knowledge |

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






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






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






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






5. Atoms that have lost or gained electrons






6. Occurs when atoms transfer electrons to other atoms






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






8. Occurs when atoms share electrons






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






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






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






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






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






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






15. Indicates the formation of new substances from previous substances






16. Subatomic particle without a charge; found in nucleus






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






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






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






20. Subatomic particle without a charge; found in nucleus






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






22. Anything that occupies space and has mass






23. Occurs when atoms transfer electrons to other atoms






24. Occurs when atoms share electrons






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






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






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






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






29. Anything that occupies space and has mass






30. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






38. Indicates the formation of new substances from previous substances






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






40. Atoms that are held together by covalent bonds






41. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






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