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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. Atoms that are held together by covalent bonds






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






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






5. Occurs when atoms share electrons






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






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






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






9. Atoms that have lost or gained electrons






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






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






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






13. Indicates the formation of new substances from previous substances






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






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






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






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






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






19. Subatomic particle without a charge; found in nucleus






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






21. Anything that occupies space and has mass






22. Occurs when atoms transfer electrons to other atoms






23. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






31. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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






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






42. Subatomic particle without a charge; found in nucleus






43. Occurs when atoms share electrons






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






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






46. Anything that occupies space and has mass






47. Atoms that have lost or gained electrons






48. Occurs when atoms transfer electrons to other atoms






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






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