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






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






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






4. Subatomic particle without a charge; found in nucleus






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






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






7. Atoms that have lost or gained electrons






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






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






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






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






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






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. Anything that occupies space and has mass






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






17. Anything that occupies space and has mass






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






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






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






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






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






23. Occurs when atoms share electrons






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






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






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






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






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






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






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






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






32. Occurs when atoms share electrons






33. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






39. Atoms that have lost or gained electrons






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






41. Subatomic particle without a charge; found in nucleus






42. Indicates the formation of new substances from previous substances






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






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






45. Atoms that are held together by covalent bonds






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






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






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






49. Indicates the formation of new substances from previous substances






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