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






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






3. Occurs when atoms share electrons






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






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






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






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






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






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






10. Occurs when atoms share electrons






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






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






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






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






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






16. Indicates the formation of new substances from previous substances






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






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






19. Occurs when atoms transfer electrons to other atoms






20. Atoms that have lost or gained electrons






21. Atoms that have lost or gained electrons






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






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






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






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






26. Subatomic particle without a charge; found in nucleus






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






28. Anything that occupies space and has mass






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






30. Indicates the formation of new substances from previous substances






31. Atoms that are held together by covalent bonds






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






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






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






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






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






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






38. Occurs when atoms transfer electrons to other atoms






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






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






41. Atoms that are held together by covalent bonds






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






43. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






49. Anything that occupies space and has mass






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