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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 made of two or more elements & one being carbon






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






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






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






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






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






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






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






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






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






11. Indicates the formation of new substances from previous substances






12. Occurs when atoms share electrons






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






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






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






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






17. Atoms that have lost or gained electrons






18. Occurs when atoms transfer electrons to other atoms






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






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






21. Atoms that have lost or gained electrons






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






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






24. Occurs when atoms share electrons






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






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






27. Atoms that are held together by covalent bonds






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






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






30. Subatomic particle without a charge; found in nucleus






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






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






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






34. Indicates the formation of new substances from previous substances






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






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






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






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






39. Anything that occupies space and has mass






40. Anything that occupies space and has mass






41. Atoms that are held together by covalent bonds






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






43. Occurs when atoms transfer electrons to other atoms






44. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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