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






2. Anything that occupies space and has mass






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






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






5. Indicates the formation of new substances from previous substances






6. Atoms that have lost or gained electrons






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






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






9. Occurs when atoms transfer electrons to other atoms






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






11. Occurs when atoms share electrons






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






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






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






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






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






17. Atoms that are held together by covalent bonds






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






19. Indicates the formation of new substances from previous substances






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






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






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






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






24. Subatomic particle without a charge; found in nucleus






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






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






27. Anything that occupies space and has mass






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






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






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






31. Subatomic particle without a charge; found in nucleus






32. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






40. Occurs when atoms share electrons






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






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






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






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






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






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






47. Atoms that are held together by covalent bonds






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






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






50. Occurs when atoms transfer electrons to other atoms