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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. Occurs when atoms share electrons






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






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






5. Atoms that have lost or gained electrons






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






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






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






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






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






11. Occurs when atoms transfer electrons to other atoms






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






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






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






15. Indicates the formation of new substances from previous substances






16. Anything that occupies space and has mass






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






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






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






20. Subatomic particle without a charge; found in nucleus






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






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






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






24. Anything that occupies space and has mass






25. Atoms that have lost or gained electrons






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






27. Occurs when atoms transfer electrons to other atoms






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






29. Indicates the formation of new substances from previous substances






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






31. Atoms that are held together by covalent bonds






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






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






34. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






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






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






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






44. Occurs when atoms share electrons






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






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






47. Atoms that are held together by covalent bonds






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






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






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