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






2. Indicates the formation of new substances from previous substances






3. Occurs when atoms share electrons






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






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






6. Subatomic particle without a charge; found in nucleus






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






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






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






10. Occurs when atoms share electrons






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






12. Anything that occupies space and has mass






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






14. Atoms that are held together by covalent bonds






15. Atoms that are held together by covalent bonds






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






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






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






19. Occurs when atoms transfer electrons to other atoms






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






21. Atoms that have lost or gained electrons






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






23. Subatomic particle without a charge; found in nucleus






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






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






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






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






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






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






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






31. Occurs when atoms transfer electrons to other atoms






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






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






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






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






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






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






38. Atoms that have lost or gained electrons






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






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






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






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






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






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






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






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






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






48. Indicates the formation of new substances from previous substances






49. Anything that occupies space and has mass






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