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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. Atoms that have lost or gained electrons






3. Indicates the formation of new substances from previous substances






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






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






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






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






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






9. Indicates the formation of new substances from previous substances






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






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






12. Atoms that are held together by covalent bonds






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






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






15. Subatomic particle without a charge; found in nucleus






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






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






18. Atoms that are held together by covalent bonds






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






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






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






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






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






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






25. Occurs when atoms transfer electrons to other atoms






26. Occurs when atoms share electrons






27. Anything that occupies space and has mass






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






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






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






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






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






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






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






37. Anything that occupies space and has mass






38. Subatomic particle without a charge; found in nucleus






39. Occurs when atoms share electrons






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






41. Atoms that have lost or gained electrons






42. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






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