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






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






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






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






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






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






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






8. Atoms that have lost or gained electrons






9. Anything that occupies space and has mass






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






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 & one being carbon






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






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






17. Anything that occupies space and has mass






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






19. Subatomic particle without a charge; found in nucleus






20. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






29. Occurs when atoms transfer electrons to other atoms






30. Subatomic particle without a charge; found in nucleus






31. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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






41. Atoms that are held together by covalent bonds






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






43. Atoms that have lost or gained electrons






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






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






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






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






48. Occurs when atoms transfer electrons to other atoms






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






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