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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. Atoms that have lost or gained electrons






3. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






11. Occurs when atoms transfer electrons to other atoms






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






13. Occurs when atoms share electrons






14. Indicates the formation of new substances from previous substances






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






16. Occurs when atoms share electrons






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






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






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






20. Occurs when atoms transfer electrons to other atoms






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






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






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






24. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






32. Atoms that have lost or gained electrons






33. Subatomic particle without a charge; found in nucleus






34. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






43. Anything that occupies space and has mass






44. Anything that occupies space and has mass






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






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






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






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






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






50. Subatomic particle without a charge; found in nucleus