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






2. Indicates the formation of new substances from previous substances






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






4. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






12. Atoms that are held together by covalent bonds






13. Occurs when atoms share electrons






14. Atoms that have lost or gained electrons






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






16. Indicates the formation of new substances from previous substances






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






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






19. Atoms that are held together by covalent bonds






20. Anything that occupies space and has mass






21. Occurs when atoms transfer electrons to other atoms






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






23. Anything that occupies space and has mass






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






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






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






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






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






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






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






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






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






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






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






35. Subatomic particle without a charge; found in nucleus






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






37. Occurs when atoms share electrons






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






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






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






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






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






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






44. Subatomic particle without a charge; found in nucleus






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






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






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






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






49. Atoms that have lost or gained electrons






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