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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 covalent bond in which one pair of electrons is shared






2. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






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






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






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






13. Atoms that are held together by covalent bonds






14. Indicates the formation of new substances from previous substances






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






16. Subatomic particle without a charge; found in nucleus






17. Indicates the formation of new substances from previous substances






18. Atoms that have lost or gained electrons






19. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






27. Occurs when atoms share electrons






28. Subatomic particle without a charge; found in nucleus






29. Occurs when atoms share electrons






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






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






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






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






34. Atoms that are held together by covalent bonds






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






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






37. Anything that occupies space and has mass






38. Anything that occupies space and has mass






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






40. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






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






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