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






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






4. Anything that occupies space and has mass






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






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






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






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






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






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






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






12. Indicates the formation of new substances from previous substances






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






14. Atoms that are held together by covalent bonds






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






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






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






18. Occurs when atoms share electrons






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






20. Subatomic particle without a charge; found in nucleus






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






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






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






24. Occurs when atoms transfer electrons to other atoms






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






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






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






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






29. Atoms that have lost or gained electrons






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






31. Anything that occupies space and has mass






32. Atoms that are held together by covalent bonds






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






34. Atoms that have lost or gained electrons






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






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






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






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






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






40. Subatomic particle without a charge; found in nucleus






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






42. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






49. Occurs when atoms share electrons






50. Indicates the formation of new substances from previous substances