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






3. Occurs when atoms share electrons






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






5. Subatomic particle without a charge; found in nucleus






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






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






8. Atoms that have lost or gained electrons






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






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






11. Atoms that are held together by covalent bonds






12. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






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






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






23. Occurs when atoms transfer electrons to other atoms






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






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






26. Occurs when atoms transfer electrons to other atoms






27. Subatomic particle without a charge; found in nucleus






28. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






37. Indicates the formation of new substances from previous substances






38. Atoms that have lost or gained electrons






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






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






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






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






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






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






45. Indicates the formation of new substances from previous substances






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






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






48. Anything that occupies space and has mass






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






50. Anything that occupies space and has mass