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






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






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






4. Indicates the formation of new substances from previous substances






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






6. Occurs when atoms share electrons






7. Indicates the formation of new substances from previous substances






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






9. Occurs when atoms transfer electrons to other atoms






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






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






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






13. Subatomic particle without a charge; found in nucleus






14. Anything that occupies space and has mass






15. Atoms that have lost or gained electrons






16. Atoms that have lost or gained electrons






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






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






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






20. Atoms that are held together by covalent bonds






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






22. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






28. Atoms that are held together by covalent bonds






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






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






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






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






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






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






35. Anything that occupies space and has mass






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






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






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






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






40. Occurs when atoms transfer electrons to other atoms






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






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






45. Occurs when atoms share electrons






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






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






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






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






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