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






2. Occurs when atoms share electrons






3. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






14. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






21. Atoms that are held together by covalent bonds






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






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






24. Occurs when atoms share electrons






25. Atoms that are held together by covalent bonds






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






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






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






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






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






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






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






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






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






35. Anything that occupies space and has mass






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






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






38. Subatomic particle without a charge; found in nucleus






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






40. Indicates the formation of new substances from previous substances






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






42. Anything that occupies space and has mass






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






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






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






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






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






48. Occurs when atoms transfer electrons to other atoms






49. Atoms that have lost or gained electrons






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