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






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






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






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






5. Occurs when atoms share electrons






6. Atoms that are held together by covalent bonds






7. Atoms that have lost or gained electrons






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






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






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






11. Anything that occupies space and has mass






12. Subatomic particle without a charge; found in nucleus






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






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






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






16. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






23. Indicates the formation of new substances from previous substances






24. Occurs when atoms share electrons






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






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






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






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






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






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






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






32. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






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






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






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






44. Subatomic particle without a charge; found in nucleus






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






46. Atoms that have lost or gained electrons






47. Occurs when atoms transfer electrons to other atoms






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






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






50. Anything that occupies space and has mass