1. A look into the periodic table and some of its elements

2. Everything around us is made up of different materials called elements. These are the basic building blocks of everything around us: the sun, the air you breathe, the water you drink, and even the dog you pet. Make sure to pay attention. After you are done reading, there will be a quiz!!!

3. Click here to hear a song on the elements

4. Scientists have discovered over 120 elements to date. Some are gasses, some are liquids, and some are solids

5. Some conduct electricity while others do not.

6. Some dissolve in water and some do not

7. Elements vary in color, shape, and even weight

8. So how do scientists categorize these different elements?

9. The periodic table helps them do this.

10. The table was first created by Dmitri Mendeleev, a Russian scientist, in the year 1869 and has been edited many times by new scientists as new information has been discovered.

11. Elements in the periodic table are arranged in rows (side to side) known as periods, and columns (up and down) known as groups.

12. It is no accident that the elements are placed in a certain period or group. There are many different patterns that you can notice if you study the periodic table.

13. The atomic radius of each element increase as you move down a group from top to bottom and decrease as you move from left to right across a period. Therefore, the element with the biggest atomic radius is located in the bottom left corner of the table.

14. The mass of an element increases both when you move down a group from top to bottom and when you move left to right across a period. Therefore, the heaviest element is located in the bottom right corner of the table.

15. Elements are arranged in the same group or period when they have similar characteristics.

16. For example, all of the elements (excluding hydrogen) react violently when placed in water. In fact, the reaction of Cesium and water actually produces sparks.

17. Scientists classify elements with many similar characteristics into 3 different categories: metal, nonmetal and metalloid.

18. Click on each element to learn more about their characteristics and uses

19.  H  Nonmetal  Is the lightest element and makes up 90% of the universe. Hydrogen is one of the elements used to make water (H 2 0) and also makes up most of the sun

20.  He  Nonmetal  Helium is an odorless gas. It is the second most abundant element in the universe. Helium is used in hot air balloons because it is less dense than the air around us.

21.  Li  Lithium is a metal used in many different types of batteries. Lithium is the least dense solid element. When pure, it silver white in color and very soft.

22.  C  Nonmetal  Carbon is the building block for all living things. It forms graphite, and under extreme pressure, forms diamonds.

23.  N  Nonmetal  Nitrogen makes up 78% of our atmosphere. It also forms vital components in food and fertilizer. Nitrogen gas is colorless and odorless.

24.  O  Nonmetal  Oxygen is a gas and is needed for humans to breathe. In order for something to burn, there must be oxygen present.

25.  Na  Metal  Sodium is an alkali earth metal. It is used in street lamps and gives the light a yellow tint. When combined with chlorine, table salt (NaCl) is formed.

26.  Al  Metal  Aluminum is a silvery white metal. It is found in many products including pop cans and tin foil.

27.  K  Metal  Potassium is an alkali earth metal found in soil. It is a vital element in the human diet. Potassium can be found in bananas.

28.  Ar  Metal  Arsenic is poisonous to all living beings and is commonly used in rat poison. It can also be found in car batteries.

29. Now you will be tested on what you have learned. Be sure to take your time and read all the questions and answers. Good Luck

30. What are the vertical groupings in the periodic table? Columns Periods Groups

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32. Correct, you are on your way to becoming a great chemist!!!

33. Where is the lightest element in the periodic table? Top left Bottom right Bottom Left

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35. Correct, you are on your way to becoming a great chemist!!!

36. Where is the heaviest element in the periodic table found? Top right Bottom left Bottom right

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38. Correct, you are on your way to becoming a great chemist!!!

39. Who was the first scientist to form the periodic table? Mendeleev Einstein Pasteur

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41. Correct, you are on your way to becoming a great chemist!!!

42. Which element makes up 78% of the atmosphere? Carbon Oxygen Nitrogen

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44. Correct, you are on your way to becoming a great chemist!!!

45. Which element is poisonous? Potassium Carbon Arsenic

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47. Correct, you are on your way to becoming a great chemist!!!

48. Which element is used to fill balloons? Carbon Helium Lithium

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50. Correct, you are on your way to becoming a great chemist!!!

51. Which element is the most abundant? Potassium Hydrogen Oxygen

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53. Correct, you are on your way to becoming a great chemist!!!

54. Which element is used in batteries? Carbon Sodium Lithium `

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56. Correct, you are on your way to becoming a great chemist!!!

57. Which element is the basic building block for all life? Carbon Sodium Nitrogen

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59. Correct, you are on your way to becoming a great chemist!!!

60. Which element is needed to be present for a fire? Hydrogen Oxygen Lithium

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62. Correct, you are on your way to becoming a great chemist!!!

63. Which element makes table salt when combined with chlorine? Sodium Potassium Aluminum

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65. Correct, you are on your way to becoming a great chemist!!!

66. Which element is used to make pop cans? Carbon Potassium Aluminum

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68. Correct, you are on your way to becoming a great chemist!!!

69. Which element is found in bananas? Nitrogen Potassium Hydrogen

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71. Correct, you are on your way to becoming a great chemist!!!

72. Congrats you have finished. If you want to retry the quiz click here If you want to reread the information click here If you want to finish exit the program click here

73.  http://www.proteacher.com/redirect.php?goto=5 381 http://www.proteacher.com/redirect.php?goto=5 381  http://sciencespot.net/Pages/classchem.html http://sciencespot.net/Pages/classchem.html  http://www.youtube.com/watch?v=GFIvXVMbII 0 http://www.youtube.com/watch?v=GFIvXVMbII 0  http://en.wikipedia.org/wiki/Periodic_table_of_e lements http://en.wikipedia.org/wiki/Periodic_table_of_e lements  http://www.chem4kids.com/files/elem_pertable. html http://www.chem4kids.com/files/elem_pertable. html End presentation