# Element Research Project

## Presentation on theme: "Element Research Project"— Presentation transcript:

Element Research Project
Robert Waller

Radium Atomic Number: 88 Atomic Mass: 226 Number of: Protons- 88
Neutrons- 138 Electrons- 88 Common Naturally Occuring Isotopes: 223Ra, 224Ra, 226Ra, 228Ra Atomic Mass Calculations: Radium 223 (mass= )(abundance= 0%) = 0 Radium 224 (mass= )(Abundance= 0%) = 0 Radium 226 (mass= )(abundance= 0%) = 0 Radium 228 (mass= )(abundance= 0%) = 0 * I wasn’t exactly sure how the atomic mass ended up at 226 if the abundance of all of the isotopes were 0. Electron Configuration: 1s2, 2s2,2p6,3s2,3p6,4s2,3d10,4p6,5s2,4d10,5p6,6s2,4f14,5d10,6p6,7s2 Abbreviated E.C. [Rn] 7s2 Common Uses: Cancer radiotherapy, neuron source for research purposes, constituent of luminescent paints. How/Where/Who Discovered: Discovered by Marie and Pierre Curie in 1898 in Bohemia; the removed uranium from the pitchblend and found that the remaining material was radioactive. *Pictures on Next Slide*

Radium Pictures I couldn’t find an orbital diagram of Radium, but on the one I filled out on the research paper, all of the orbitals were filled up to 5f, where only one box was completely filled with 2 electrons.

Mendelevium Atomic Number: 101 Atomic Mass: 258 Number of:
Protons- 101 Neutrons- 157 Electrons- 101 Common Naturally Occurring Isotopes: 257Md, 258Md, 260Md – all have 0% abundance Calculations showing how atomic mass is found: Mendelevium 257 (mass= )(abundance=0%) Mendelevium 258 (mass= )(abundance=0%) Mendelevium 260 (mass= )(abundance=0%) *Just like with Radium, I wasn’t sure how the atomic mass reached 258 with all of the isotopes having 0% abundance Electron Configuration: 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,4d10,4f14,5s2,5p6,5d10,5f13,6s2,6p6,7s2 Abbreviated E.C.: [Rn] 5f13,7s2 Common Uses: There are no known uses How/Where/Who Discovered: Albert Ghiorso,B.G. Harvey, G.R. Chopplin, S.G.Thompson and G.T.Seaborg. It was discovered in Berkley, California. Mendelevium is made by bombarding Einsteinium with helium ions. Almost no Mendelevium has ever been produced. *Pictures on next slide*

Mendelevium Pictures                                                                                                                     I couldn’t find a picture of an orbital diagram of Mendelevium, but I filled one out on the corresponding research paper, and on it, the boxes all had 2 marks in them all the way up to the 5f level where 6 out of 7 boxes were filled. In the 7th box, there was one mark

Tellurium = 127.6 Atomic Number: 52 Atomic Mass: 127 Number of:
Protons- 52 Neutrons- 75 Electrons- 52 Common Naturally Occurring Isotopes: 120Te,121Te,122Te,123Te,124Te,125Te,126Te,127Te,128Te,129Te,130Te Atomic Mass Calculations: Tellurium 120 (mass= ) x (Abundance= 0.09%) = 0.108 Tellurium 121 (mass= ) x (Abundance= 0%) = 0 Tellurium 122 (mass= ) x (Abundance= 2.55%) = 3.109 Tellurium 123 (mass= ) x (Abundance= 0.89%) = 1.093 Tellurium 124 (mass= ) x (Abundance= 4.74%) = 5.872 Tellurium 125 (mass= ) x (Abundance= 7.07%) = 8.830 Tellurium 126 (mass= ) x (Abundance= 18.84%) = Tellurium 127 (mass= ) x (Abundance= 0%) = 0 Tellurium 128 (mass= ) x (Abundance= 31.74%) = Tellurium 129 (mass= ) x (Abundance= 0%) = 0 Tellurium 130 (mass= ) x (Abundance= 34.08%) = = 127.6 Electron Configuration: 1s2,2s2,2p6,3s2,3p6,3d10,4s2,4p6,4d10,5s2,5p4 Abbreviated E.C.: [Kr] 4d10 5s2 5p4 Common Uses: Used to improve the machining quality of metal products and to color glass and ceramics. Also used in thermoelectric devices, vulcanization of rubber, percussion caps, battery plate protectors and electrical resistors. How/Where/Who discovered: Baron Franz Müller von Reichenstein in 1782 in Romania. Tellurium is a by-product of refining lead and copper *Pictures on Next Slide*

Tellurium Pictures I couldn’t find a picture of an orbital diagram, but the one I filled out in the research paper had all the boxes full up to the 5p orbital, where 2 of the 3 boxes were totally filled. The last box was empty.

Works Cited www.google.com (For the pictures)
(Orbital Diagram pictures, Electron Configurations, and How/Where/Who info.) (All info associated with protons, electrons, neutrons, isotopes, and atomic mass.) (For any additional info needed) (For any words I didn’t know)