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






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






4. Atoms that are held together by covalent bonds






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






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






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






8. Indicates the formation of new substances from previous substances






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






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






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






12. Anything that occupies space and has mass






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






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






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






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






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






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






19. Occurs when atoms transfer electrons to other atoms






20. Subatomic particle without a charge; found in nucleus






21. Anything that occupies space and has mass






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






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






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






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






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






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






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






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






30. Occurs when atoms share electrons






31. Atoms that have lost or gained electrons






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






33. Atoms that have lost or gained electrons






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






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






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






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






38. Occurs when atoms transfer electrons to other atoms






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






40. Indicates the formation of new substances from previous substances






41. Occurs when atoms share electrons






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






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






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






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






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






47. Subatomic particle without a charge; found in nucleus






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






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






50. Atoms that are held together by covalent bonds