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. Occurs when atoms transfer electrons to other atoms






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






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






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






5. Subatomic particle without a charge; found in nucleus






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






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






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






9. Occurs when atoms share electrons






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






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






12. Atoms that are held together by covalent bonds






13. Indicates the formation of new substances from previous substances






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






15. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






24. Indicates the formation of new substances from previous substances






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






26. Occurs when atoms share electrons






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






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






29. Atoms that are held together by covalent bonds






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






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






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






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






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






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






36. Anything that occupies space and has mass






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






38. Occurs when atoms transfer electrons to other atoms






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






40. Anything that occupies space and has mass






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






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






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






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






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






48. Atoms that have lost or gained electrons






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






50. Subatomic particle without a charge; found in nucleus