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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 have lost or gained electrons






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






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






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






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






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






8. Atoms that have lost or gained electrons






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






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






11. Indicates the formation of new substances from previous substances






12. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






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






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






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






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






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






24. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






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






34. Subatomic particle without a charge; found in nucleus






35. Occurs when atoms transfer electrons to other atoms






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






37. Anything that occupies space and has mass






38. Occurs when atoms transfer electrons to other atoms






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






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






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






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






43. Atoms that are held together by covalent bonds






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






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






46. Occurs when atoms share electrons






47. Occurs when atoms share electrons






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






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






50. Indicates the formation of new substances from previous substances