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






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






4. Subatomic particle without a charge; found in nucleus






5. Atoms that have lost or gained electrons






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






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






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






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






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






11. Occurs when atoms share electrons






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






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






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






15. Anything that occupies space and has mass






16. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






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






24. Occurs when atoms transfer electrons to other atoms






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






26. Atoms that have lost or gained electrons






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






28. Indicates the formation of new substances from previous substances






29. Atoms that are held together by covalent bonds






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






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






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






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






34. Anything that occupies space and has mass






35. Atoms that are held together by covalent bonds






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






37. Occurs when atoms transfer electrons to other atoms






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






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






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






41. Indicates the formation of new substances from previous substances






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






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






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






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






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






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






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






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






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