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






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






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






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






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






6. Occurs when atoms transfer electrons to other atoms






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






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






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






10. Occurs when atoms share electrons






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






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






13. Atoms that have lost or gained electrons






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






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






16. Subatomic particle without a charge; found in nucleus






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






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






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






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






21. Indicates the formation of new substances from previous substances






22. Subatomic particle without a charge; found in nucleus






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






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






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






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






27. Indicates the formation of new substances from previous substances






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






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






30. Atoms that have lost or gained electrons






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






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






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






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






35. Occurs when atoms share electrons






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






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






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






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






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






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






42. Atoms that are held together by covalent bonds






43. Occurs when atoms transfer electrons to other atoms






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






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






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






47. Atoms that are held together by covalent bonds






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






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






50. Anything that occupies space and has mass