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






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






3. Occurs when atoms share electrons






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






5. Subatomic particle without a charge; found in nucleus






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






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






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






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






10. Atoms that are held together by covalent bonds






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






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






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






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






15. Atoms that are held together by covalent bonds






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






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






18. Atoms that have lost or gained electrons






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






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






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






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






23. Indicates the formation of new substances from previous substances






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






25. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






31. Anything that occupies space and has mass






32. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






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






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






43. Indicates the formation of new substances from previous substances






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






45. Occurs when atoms transfer electrons to other atoms






46. Occurs when atoms share electrons






47. Occurs when atoms transfer electrons to other atoms






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






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






50. Anything that occupies space and has mass