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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. Indicates the number and types of atoms in a molecule






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






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






4. Indicates the formation of new substances from previous substances






5. Occurs when atoms share electrons






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






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






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






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






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






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






12. Atoms that have lost or gained electrons






13. Occurs when atoms share electrons






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






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






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






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






18. Subatomic particle without a charge; found in nucleus






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






20. Occurs when atoms transfer electrons to other atoms






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






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






23. Anything that occupies space and has mass






24. Atoms that are held together by covalent bonds






25. Indicates the formation of new substances from previous substances






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






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






28. Anything that occupies space and has mass






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






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






31. Atoms that are held together by covalent bonds






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






33. Atoms that have lost or gained electrons






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






35. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






41. Subatomic particle without a charge; found in nucleus






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






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






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






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






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 & none of which is carbon






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






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