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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. Atoms that are held together by covalent bonds






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






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






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






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






7. Subatomic particle without a charge; found in nucleus






8. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






17. Occurs when atoms share electrons






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






19. Indicates the formation of new substances from previous substances






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






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






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






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






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






25. Indicates the formation of new substances from previous substances






26. Atoms that have lost or gained electrons






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






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






29. Anything that occupies space and has mass






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






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






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






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






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






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






36. Occurs when atoms share electrons






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






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






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






40. Anything that occupies space and has mass






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






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






43. Subatomic particle without a charge; found in nucleus






44. Occurs when atoms transfer electrons to other atoms






45. Occurs when atoms transfer electrons to other atoms






46. Atoms that have lost or gained electrons






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






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






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






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