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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 have lost or gained electrons






3. Occurs when atoms transfer electrons to other atoms






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






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






6. Subatomic particle without a charge; found in nucleus






7. Indicates the formation of new substances from previous substances






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






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






10. Subatomic particle without a charge; found in nucleus






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






12. Atoms that are held together by covalent bonds






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






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






15. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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






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






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






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






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






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






30. Anything that occupies space and has mass






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






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






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






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






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






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






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






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






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






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






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






42. Atoms that have lost or gained electrons






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






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






45. Anything that occupies space and has mass






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






47. Occurs when atoms share electrons






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






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






50. Occurs when atoms transfer electrons to other atoms