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






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






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






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






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






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






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






9. Atoms that have lost or gained electrons






10. Atoms that are held together by covalent bonds






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






12. Occurs when atoms transfer electrons to other atoms






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






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






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






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






17. Atoms that have lost or gained electrons






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






19. Occurs when atoms share electrons






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






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






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






23. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






32. Indicates the formation of new substances from previous substances






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






34. Atoms that are held together by covalent bonds






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






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






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






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






39. Occurs when atoms transfer electrons to other atoms






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






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






42. Indicates the formation of new substances from previous substances






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






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






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






46. Anything that occupies space and has mass






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






48. Anything that occupies space and has mass






49. Subatomic particle without a charge; found in nucleus






50. Subatomic particle without a charge; found in nucleus