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






2. Indicates the formation of new substances from previous substances






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






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






5. Subatomic particle without a charge; found in nucleus






6. Atoms that have lost or gained electrons






7. Occurs when atoms share electrons






8. Anything that occupies space and has mass






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






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






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






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






13. Anything that occupies space and has mass






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






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






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






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






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






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






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






21. Atoms that are held together by covalent bonds






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






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






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






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






26. Indicates the formation of new substances from previous substances






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






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






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






30. Atoms that have lost or gained electrons






31. Occurs when atoms transfer electrons to other atoms






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






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






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






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






36. Atoms that are held together by covalent bonds






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






38. Occurs when atoms share electrons






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






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






41. Subatomic particle without a charge; found in nucleus






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






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






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






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






46. Occurs when atoms transfer electrons to other atoms






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






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






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






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