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






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






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






4. Occurs when atoms share electrons






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






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






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






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






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






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






11. Atoms that are held together by covalent bonds






12. Subatomic particle without a charge; found in nucleus






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






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






15. Indicates the formation of new substances from previous substances






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






17. Atoms that are held together by covalent bonds






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






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






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






21. Indicates the formation of new substances from previous substances






22. Occurs when atoms share electrons






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






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






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






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






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






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






29. Occurs when atoms transfer electrons to other atoms






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






31. Atoms that have lost or gained electrons






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






33. Atoms that have lost or gained electrons






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






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






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






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






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






39. Occurs when atoms transfer electrons to other atoms






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






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






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






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






44. Anything that occupies space and has mass






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






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






47. Anything that occupies space and has mass






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






49. Subatomic particle without a charge; found in nucleus






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