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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 four valence electrons are shared between two atoms






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






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






4. Occurs when atoms share electrons






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






6. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






23. Atoms that have lost or gained electrons






24. Occurs when atoms share electrons






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






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






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






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






29. Anything that occupies space and has mass






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






31. Subatomic particle without a charge; found in nucleus






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






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






34. Occurs when atoms transfer electrons to other atoms






35. Atoms that are held together by covalent bonds






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






37. Indicates the formation of new substances from previous substances






38. Anything that occupies space and has mass






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






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






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






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






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






44. Occurs when atoms transfer electrons to other atoms






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






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






47. Subatomic particle without a charge; found in nucleus






48. Atoms that have lost or gained electrons






49. Atoms that are held together by covalent bonds






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