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






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






4. Atoms that have lost or gained electrons






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






6. Atoms that are held together by covalent bonds






7. Occurs when atoms share electrons






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






9. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






18. Subatomic particle without a charge; found in nucleus






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






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






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






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






23. Occurs when atoms share electrons






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






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






26. Subatomic particle without a charge; found in nucleus






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






28. Indicates the formation of new substances from previous substances






29. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






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






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






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






40. Indicates the formation of new substances from previous substances






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






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






43. Anything that occupies space and has mass






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






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






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






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






48. Atoms that are held together by covalent bonds






49. Anything that occupies space and has mass






50. Occurs when atoms transfer electrons to other atoms