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






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






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






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






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






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






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






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






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






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






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






12. Indicates the formation of new substances from previous substances






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






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






15. Atoms that have lost or gained electrons






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






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






18. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






26. Occurs when atoms transfer electrons to other atoms






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






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






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






30. Occurs when atoms share electrons






31. Atoms that are held together by covalent bonds






32. Anything that occupies space and has mass






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






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






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






36. Indicates the formation of new substances from previous substances






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






38. Occurs when atoms transfer electrons to other atoms






39. Atoms that have lost or gained electrons






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






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






42. Subatomic particle without a charge; found in nucleus






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






44. Subatomic particle without a charge; found in nucleus






45. Anything that occupies space and has mass






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






47. Occurs when atoms share electrons






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






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






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