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






3. Occurs when atoms transfer electrons to other atoms






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






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






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






7. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






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






17. Subatomic particle without a charge; found in nucleus






18. Atoms that are held together by covalent bonds






19. Subatomic particle without a charge; found in nucleus






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






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






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






23. Atoms that have lost or gained electrons






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






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






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






27. Occurs when atoms transfer electrons to other atoms






28. Anything that occupies space and has mass






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






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






31. Occurs when atoms share electrons






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






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






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






35. Indicates the formation of new substances from previous substances






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






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






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






39. Anything that occupies space and has mass






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






41. Atoms that have lost or gained electrons






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






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






44. Indicates the formation of new substances from previous substances






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






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






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






48. Occurs when atoms share electrons






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






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