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






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






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






4. Atoms that have lost or gained electrons






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






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






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






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






9. Indicates the formation of new substances from previous substances






10. Occurs when atoms share electrons






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






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






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






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






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






16. Anything that occupies space and has mass






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






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






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






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






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






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






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






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






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






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






27. Atoms that have lost or gained electrons






28. Occurs when atoms transfer electrons to other atoms






29. Atoms that are held together by covalent bonds






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






31. Subatomic particle without a charge; found in nucleus






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






33. Indicates the formation of new substances from previous substances






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






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






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






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






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






39. Occurs when atoms transfer electrons to other atoms






40. Subatomic particle without a charge; found in nucleus






41. Atoms that are held together by covalent bonds






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






43. Occurs when atoms share electrons






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






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






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






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






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






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






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