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






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






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






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






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






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






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






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






9. Anything that occupies space and has mass






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






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






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






13. Indicates the formation of new substances from previous substances






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






15. Indicates the formation of new substances from previous substances






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






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






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






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






20. Occurs when atoms share electrons






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






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






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






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






25. Atoms that have lost or gained electrons






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






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






28. Occurs when atoms transfer electrons to other atoms






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






30. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






37. Anything that occupies space and has mass






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






39. Atoms that are held together by covalent bonds






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






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






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






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






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






45. Subatomic particle without a charge; found in nucleus






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






47. Atoms that have lost or gained electrons






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






49. Occurs when atoms share electrons






50. Subatomic particle without a charge; found in nucleus