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






2. Anything that occupies space and has mass






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






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






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






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






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






8. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






15. Atoms that are held together by covalent bonds






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






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






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






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






20. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






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






28. Occurs when atoms transfer electrons to other atoms






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






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






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






32. Occurs when atoms transfer electrons to other atoms






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






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






35. Occurs when atoms share electrons






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






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






38. Atoms that have lost or gained electrons






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






40. Atoms that have lost or gained electrons






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






42. Indicates the formation of new substances from previous substances






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






44. Anything that occupies space and has mass






45. Atoms that are held together by covalent bonds






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






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






48. Subatomic particle without a charge; found in nucleus






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






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