Nicole Luchansky

Science Enrichment

  1. “I read the caption.”
  2. “I read the article.”
  3. The element other than argon in Period three that is a gas is chlorine.
  4. “I read the caption.”
  5. “I read the article.”
  6. “I read the caption.”
  7. When potassium comes into contact with water, its reaction is similar to sodium’s. Potassium is also an alkali metal, which means that it is highly reactive and contains one valence. If potassium is more reactive than sodium, than the potassium will react with water and ignite the hydrogen. The potassium will just do these steps faster than sodium, and there wil be a bigger ignition.
  8. I read the article.”
  9. 0: there are no nonmetals.
  10. The fertilizer that contains the most phosphorous is the tomato food because it has the highest amount at 10.
  11. “I read the caption.”
  12. “I read the caption.”
  13. The process that causes iodine vapor to collect in a flask of solid iodine is evaporation, because when the iodine is heated, it rises into the flask.
  14. The element that exists in almost every compound of you body is carbon.
  15. The biological function that requires magnesium is the process of photosynthesis. (use sunlight to produce sugar in plants)
  16. Aluminum is recycled because the energy needed to purify recycled aluminum is only about 5 percent of the energy needed to extract aluminum from bauxite.
  17. The main use of sulfur is in the production of sulfuric acid, a compound of sulfur, hydrogen, and oxygen. About 65 percent of the sulfuric acid produced in America is used to make fertilizers.
  18. Chlorine is added to drinking water to kill dangerous bacteria.
  19. “I read the article.”
  20. “I read the article.”
  21. C
  22. A
  23. A
  24. B
  25. B
  26. C
  27. D
  28. In general, the reactivity of elements in groups labeled A decrease as atomic numbers increase across the left, or metal side of the period. The reactivity of the right side or nonmetals side increases as atomic numbers increase.
  29. There are no metals shown. There are 5 nonmetals, and three metalloid.
  30. The element that is a liquid at room temperature is Bromine. The element that is a gas at room temperature is hydrogen.
  31. The two halogens shown in the table are Bromine and Chlorine. The halogen that is more reactive is chlorine because it kills bacteria easily and reacts easily with most metals. Chlorine is the second most reactive halogen other than fluorine. Bromine does not react as easily.
  32. Selenium has more in common with sulfur than it does with bromine. This is so because sulfur and selenium are both in the same group.
  33. An element on the periodic table has two naturally occurring isotopes. One isotope has an atomic mass of 10 amu and the other has an atomic mass of 11 amu. Therefore, the name of the element is Boron because when 10 and 11 are averaged, they are 10.5. Boron’s atomic weight is 10.8, which is the closest.
  34. If an element has an atomic number of 113, then it would have three valence electrons.
  35. Halogens found in nature are only compounds because
  36. The element in the periodic table that has chemical properties similar to carbon is silicon because they are in the same group. (Group 4A)
  37. In general, you would find the Elements X, Y, and Z on the metals side of the periodic table, or the left side. Element X would be under family A1, Element Y would be under family A7, and so would Element Z.
  38. Liquid X-solid Liquid Y-gas Liquid Z-gas
  39. Element Y would be the element sodium because sodium is a gas at room temperature, sodium as a boiling point of 883 degrees Celsius, a melting point of 97.8 degrees Celsius, and is in Family 1A, giving it one valence electron.
  40. If a beaker made of glass not holding boron, was heated and placed in a pan of ice water, then the beaker would shatter because there would be a rapid change in temperature.
  41. A
  42. The old books could be kept from falling apart when exposed to air, by being stored in pure nitrogen. Nitrogen is one of the least reactive non metals. Therefore, nitrogen would protect the old books from falling apart.
  43. 1. C

2. C

3. A

4. C

5. B

6. D

7. E