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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. Occurs when atoms share electrons






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






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






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






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






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






7. Anything that occupies space and has mass






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






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






10. Anything that occupies space and has mass






11. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






19. Occurs when atoms transfer electrons to other atoms






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






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






22. Subatomic particle without a charge; found in nucleus






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






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






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






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






27. Atoms that have lost or gained electrons






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






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






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






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






32. Occurs when atoms transfer electrons to other atoms






33. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






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






43. Atoms that are held together by covalent bonds






44. Indicates the formation of new substances from previous substances






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






46. Atoms that have lost or gained electrons






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






48. Occurs when atoms share electrons






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






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