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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. Occurs when atoms share electrons






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






3. Occurs when atoms transfer electrons to other atoms






4. Anything that occupies space and has mass






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






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






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






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






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






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






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






12. Atoms that are held together by covalent bonds






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






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






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






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






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






20. Atoms that have lost or gained electrons






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






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






23. Atoms that are held together by covalent bonds






24. Subatomic particle without a charge; found in nucleus






25. Indicates the formation of new substances from previous substances






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






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






28. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






37. Indicates the formation of new substances from previous substances






38. Atoms that have lost or gained electrons






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






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






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






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






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






44. Occurs when atoms transfer electrons to other atoms






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






46. Anything that occupies space and has mass






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






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






49. Subatomic particle without a charge; found in nucleus






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