The Disappearing Spoon By Sam Kean

Chapter 6 Completing The Table...With A Bang By: Hope Kelley

Synopsis

This chapter talked about how the elements were brought to Earth by a supernova shower, but because of their fragile core they were not able to survive in nature. This left holes in the periodic table that scientist filled with elements that they made. It also talks about a diligent student from the University of Manchester named Henry Moseley, who made his own periodic table and published in 1869. The chapter then went on to talk about the first bombs made to be used in WWII. These bombs were made from Cobalt and Plutonium.

Element 61- Promethium

On the periodic Table the element Promethium is not found in a regular period or a "Family" group, but it is found in a different group called Lanthanide series. It was named after a Greek mythology who stole fire and gave it to humans, and was punished for eternity for doing so. It's atomic number is 61 and it's atomic mass is 145. It is classified as a transition metal and it's electron configuration is 1s^2 2s^2 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^5. It can be found in uranium ores.

Element 94 - Plutonium

On the periodic table the element Plutonium is not found in a regular period or a "Family" group, but it is found i a different group called Actinide series. It's atomic number is 94 and it's atomic mass is 244. It is classified as a transition metal and it's electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^2 5f^6. It can be found in uranium ores.

Element 27- Cobalt

On the periodic table the element cobalt is found in group 9 and period 4. It's atomic number is 27 and it's atomic mass is 58.93. It is classified as a transition metal and it's electron configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^7. It can be found in cobalttite, skutterudite, and erythrite which are found in places such as DR Congo, Canada, Australia, Zambia, and Brazic.

Sources

"The Element Promethium." It's Elemental -. Steve Gagnon. Web. 23 Jan. 2016.

"The Element Plutonium." It's Elemental -. Steve Gagnon. Web. 23 Jan. 2016.

"The Element Cobalt." It's Elemental -. Steve Gagnon. Web. 23 Jan. 2016.