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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 are held together by covalent bonds






3. Atoms that have lost or gained electrons






4. Indicates the formation of new substances from previous substances






5. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






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






13. Atoms that are held together by covalent bonds






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






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






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






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






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






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






20. Indicates the formation of new substances from previous substances






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






22. Subatomic particle without a charge; found in nucleus






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






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






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






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






27. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






33. Anything that occupies space and has mass






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






35. Atoms that have lost or gained electrons






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






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






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






39. Occurs when atoms share electrons






40. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






47. Anything that occupies space and has mass






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






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






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