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






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






6. Subatomic particle without a charge; found in nucleus






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






8. Indicates the formation of new substances from previous substances






9. Anything that occupies space and has mass






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






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






12. Atoms that are held together by covalent bonds






13. Atoms that have lost or gained electrons






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. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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






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






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






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






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






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






31. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






39. Anything that occupies space and has mass






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






41. Atoms that have lost or gained electrons






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






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






44. Subatomic particle without a charge; found in nucleus






45. Occurs when atoms share electrons






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






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






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






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






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