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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 one pair of electrons is shared






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






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






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






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






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






7. Subatomic particle without a charge; found in nucleus






8. Occurs when atoms share electrons






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






10. Indicates the formation of new substances from previous substances






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






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






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






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






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






16. Atoms that have lost or gained electrons






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






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






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






20. Atoms that are held together by covalent bonds






21. Anything that occupies space and has mass






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






23. Occurs when atoms transfer electrons to other atoms






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






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






26. Atoms that have lost or gained electrons






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






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






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






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






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






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






33. Atoms that are held together by covalent bonds






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






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






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






37. Anything that occupies space and has mass






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






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






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






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






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






43. Indicates the formation of new substances from previous substances






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






45. Subatomic particle without a charge; found in nucleus






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






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






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






49. Occurs when atoms share electrons






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