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






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






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






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






6. Occurs when atoms transfer electrons to other atoms






7. Indicates the formation of new substances from previous substances






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






9. Atoms that have lost or gained electrons






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






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






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






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






14. Occurs when atoms transfer electrons to other atoms






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






16. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






24. Subatomic particle without a charge; found in nucleus






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






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






27. Occurs when atoms share electrons






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






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






30. Occurs when atoms share electrons






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






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






33. Atoms that have lost or gained electrons






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






35. Atoms that are held together by covalent bonds






36. Subatomic particle without a charge; found in nucleus






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






38. Anything that occupies space and has mass






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






40. Anything that occupies space and has mass






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






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






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






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






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






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






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






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






49. Atoms that are held together by covalent bonds






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