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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 covalent bond in which one pair of electrons is shared






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






3. Atoms that have lost or gained electrons






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






5. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






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






15. Indicates the formation of new substances from previous substances






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






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






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






19. Subatomic particle without a charge; found in nucleus






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






21. Atoms that are held together by covalent bonds






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






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






24. Anything that occupies space and has mass






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






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






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






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






29. Occurs when atoms transfer electrons to other atoms






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






31. Indicates the formation of new substances from previous substances






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






33. Atoms that have lost or gained electrons






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






35. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






43. Occurs when atoms share electrons






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






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






46. Subatomic particle without a charge; found in nucleus






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






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






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






50. Anything that occupies space and has mass