The Periodic Table

Clarissa Rodriguez- 6

A Little Bit About the Periodic Table

The periodic table is a table with all the chemical elements. It is arranged by atomic number. So that elements with similar atomic structure are near each other, they are put in rows, and usually appear in vertical columns. Each element on the periodic table has an atomic number, atomic mass, what it is, and its abbreviation.

How the Elements are Set Up On the Periodic Table

Usually this is how it is set up. At the top of each individual element is it's atomic number. It's atomic mass is at the bottom. Right above the atomic mass is what it is called (Some elements are named after famous people such as einsteinium obviously name after Albert Einstein.). Then on top of that is it's abbreviation (silicon, Si). The periodic table has three main categories, metals, non-metals, and metalloids. The metals are put on the far left, then the metalloids, and lastly on the far right is the non-metals.

What are Elements?

Elements are the building blocks of matter. Everything from you to the door is made of matter. Every single thing that takes up space is made of matter.

The Creator of the Periodic Table

Dmitri Mendeleev is the creator of the Periodic Table. His system was to put the known elements in order of atomic mass. Starting with the smallest and ending with the largest. This system worked but unfortunately it didn't completely work out. For instants, tellurium has an atomic mass of 128, and in his system that came before iodine which was 127. That was the only way it would work though. Henry Moseley solved all of these problems by ordering the elements by atomic number and not mass.

Some History

The first element to be scientifically discovered was in 1649. It was the element phosphorus. Phosphorus was discovered by Hennig Brand. In 1864 a chemist named John Newlands arranged the elements in order of atomic weight and noticed that every eight elements there was a periodic similarity. Also a new block of the peiodic table, the actinide, was added when an artificially produced heavy mass element ( such as neptunium) was created by Glenn Seaborg.

Going Deeper

From 1649 to 1869 sixty three elements were discovered. In 1898 Lord Rayleigh discovered a gaseous element called argon (which is an inert gas). Three years later (in 1898) William Ramsay proposed argon be put between potassium and chlorine (a family of helium) despite the fact that it should have been put after the two. This part of the periodic table was called the zero valency, because of the lack of combining power. Then the future discovery of neon was predicted accurately by Ramsay as well. Glenn Seaborg discovered all transuranic elements 94-102. In 1940 he discovered plutonium. He also got the Nobel Prize in chemistry. The element seaborgium (Sg) was named after him in his honor.

The Periodic Table Interests People of All Ages

3 year old Brielle recites the Periodic Table of Elements!

Follow Along With Brielle!

These are all of the known elements as of February 12, 2016.

1. Hydrogen, H

2. Helium, He

3. Lithium, Li

4. Beryllium, Be

5. Boron, B

6. Carbon, C

7. Nitrogen, N

8. Oxygen, O

9. Fluorine, F

10. Neon, Ne

11. Sodium, Na

12. Magnesium, Mg

13. Aluminum, Al

14. Silicon, Si

15. Phosphorus, P

16. Sulfur, S

17. Chlorine, Cl

18. Argon, Ar

19. Potassium, K

20. Calcium, Ca

21. Scandium, Sc

22. Titanium, Ti

23. Vanadium, V

24. Chromium, Cr

25. Manganese, Mn

26. Iron, Fe

27. Cobalt, Co

28. Nickel, Ni

29. Copper, Cu

30. Zinc, Zn

31. Gallium, Ga

32. Germanium, Ge

33. Arsenic, As

34. Selenium, Se

35. Bromine, Br

36. Krypton, Kr

37. Rubidium, Rb

38. Strontium, Sr

39. Yttrium, Y

40. Zirconium, Zr

41. Niobium, Nb

42. Molybdenum, Mo

43. Technetium, Tc

44. Ruthenium, Ru

45. Rhodium, Rh

46. Palladium, Pd

47. Silver, Ag

48. Cadmium, Cd

49. Indium, In

50. Tin, Sn

51. Antimony, Sb

52. Tellurium, Te

53. Iodine, I

54. Xenon, Xe

55. Cesium, Cs

56. Barium, Ba

57. Lanthanum, La

58. Cerium, Ce

59. Praseodymium, Pr

60. Neodymium, and

61. Promethium, Pm

62. Samarium, Sm

63. Europium, Eu

64. Gadolinium, Gd

65. Terbium, Tb

66. Dysprosium, Dy

67. Holmium, Ho

68. Erbium, Er

69. Thulium, Tm

70. Ytterbium, Yb

71. Lutetium, Lu

72. Hafnium, Hf

73. Tantalum, Ta

74. Tungsten, W

75. Rhenium, Re

76. Osmium, Os

77. Iridium, Ir

78. Platinum, Pt

79. Gold, Au

80. Mercury, Hg

81. Thallium, Tl

82. Lead, Pb

83. Bismuth, Bi

84. Polonium, Po

85. Astatine, At

86. Radon, Rn

87. Francium, Fr

88. Radium, Ra

89. Actinium, Ac

90. Thorium, Th

91. Protactinium, Pa

92. Uranium, U

93. Neptunium, Np

94. Plutonium, Pu

95. Americium, Am

96. Curium, Cm

97. Berkelium, Bk

98. Californium, Cf

99. Einsteinium, Es

100. Fermium, Fm

101. Mendelevium, Md

102. Nobelium, No

103. Lawrencium, Lr

104. Rutherfordium, Rf

105. Dubnium, Db

106. Seaborgium, Sg

107. Bohrium, Bh

108. Hassium, Hs

109. Meitnerium, Mt

110. Darmstadtium, Ds

111. Roentgenium, Rg

112. Copernicium, Cp

113. Ununtrium, Uut

114. Ununquadium, Uuq

115. Ununpentium, Uup

116. Ununhexium, Uuh

117. Ununseptium, Uus

118. Ununoctium, Uuo