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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. Occurs when atoms transfer electrons to other atoms






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






6. Indicates the formation of new substances from previous substances






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






8. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






14. Atoms that are held together by covalent bonds






15. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






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






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






24. Anything that occupies space and has mass






25. Atoms that are held together by covalent bonds






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






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






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






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






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






31. Indicates the formation of new substances from previous substances






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






33. Atoms that have lost or gained electrons






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






35. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






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






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






46. Occurs when atoms transfer electrons to other atoms






47. Occurs when atoms share electrons






48. Anything that occupies space and has mass






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






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