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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. Occurs when atoms share electrons






2. Atoms that are held together by covalent bonds






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






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






5. Atoms that have lost or gained electrons






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






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






8. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






15. Subatomic particle without a charge; found in nucleus






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






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






18. Indicates the formation of new substances from previous substances






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






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






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






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






23. Atoms that have lost or gained electrons






24. Occurs when atoms share electrons






25. Indicates the formation of new substances from previous substances






26. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






34. Occurs when atoms transfer electrons to other atoms






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






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






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






38. Anything that occupies space and has mass






39. Anything that occupies space and has mass






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






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






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






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






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






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






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






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






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






49. Occurs when atoms transfer electrons to other atoms






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