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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. Subatomic particle without a charge; found in nucleus






3. Atoms that are held together by covalent bonds






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






5. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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






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






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






17. Occurs when atoms share electrons






18. Anything that occupies space and has mass






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






20. Occurs when atoms transfer electrons to other atoms






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






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






23. Anything that occupies space and has mass






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






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






26. Atoms that have lost or gained electrons






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






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






29. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






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






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






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






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






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






43. Indicates the formation of new substances from previous substances






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






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






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






47. Atoms that are held together by covalent bonds






48. Atoms that have lost or gained electrons






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






50. Subatomic particle without a charge; found in nucleus