Elements Definition - matter that is made up of only one kind of atom

Periodic Table of Elements The Periodic Table of Elements is a chart used to organize and classify all of the elements.

All information about an atom can be found on the Periodic Table of Elements.

Symbol for the element: Name of the element Symbol for the element: First letter always capitalized Second and third letters always lower case Periods are not used Atomic number: The number of protons in the nucleus Atomic mass: The number of protons and neutrons in the nucleus

Information about atoms found on the Periodic Table of Elements: 18 atomic number Ar symbol Argon element name 39.948 atomic mass Round atomic mass to the nearest whole number (40)

27 Co cobalt 59 atomic number number of protons protons = electrons element symbol Co element name cobalt atomic mass protons + neutrons 59

neon sodium                                             phosphorous calcium

copper arsenic                                             iodine seaborgium

7 Nitrogen 226 138 12 6 59 27 4 2 Lithium 24 133 55 14 7 88 Radium 6 atomic mass number of neutrons number of protons element 7 Nitrogen 226 138 12 6 59 27 4 2 Lithium 24 133 55 14 7 88 Radium 6 Carbon 32 Cobalt Helium 2 7 3 12 Magnesium 78 Cesium

8 119 69 117 Platinum 146 92 35 Chlorine 59 31 108 47 16 16 Oxygen Tin atomic mass number of neutrons number of protons element 8 119 69 117 Platinum 146 92 35 Chlorine 59 31 108 47 16 16 Oxygen Tin 50 195 78 238 Uranium 17 18 28 Nickel 61 Silver Phosphorous 15

Interactive Periodic Table of Elements #1