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Hantaro Nagaoka

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Lou Vanhauwaert

on 17 September 2012

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Transcript of Hantaro Nagaoka

His Contribution to the Atomic Theory Hantaro Nagaoka Hantaro's life before and after his contributions to the Atomic Theory Hantaro Nagaoka's Life -Hantaro Nagaoka was born in Nagasaki, Japan on the 15th of August, 1165. Most of his family is unknown, except for him.
-Hantaro Nagaoka studued at the Tokyo University and graduated successfully in 1887.
-Before Hantaro Nagaoka started to think about the Atomic Theory, he worked with a British scientist, C. G.
Knott. They studied the perspectives of magnetism.
-Hantaro Nagaoka was inspired by Marie Curie to start to study atoms when she gave a speech about radioactivity.
-Hantaro Nagaoka then travelled to Europe where he dug deeper into his studies in the Universities of Munich, Berlin and Vienna.
-After he finished his studies, he started to conduct experiments of his own and became a teacher when he decided to move back to Japan.
-Hantaro Nagaoka died in Japan on December 11th, 1950. He was aged 85 when he passed away. Characteristics of Atoms Before & After Presented an Atomic Model that is close to the one accepted today. The Atomic Model that Hantaro Nagaoka presented has characteristics that are shown in the Modern Atomic Model;
1. Elements are composed of atoms
2. All atoms of an element are identical and have the same mass
3. Atoms of different elements have different weights
4. Elements combine to form compounds in fixed ratios
5. Atoms cannot be created, divided, or destroyed
(conservation of mass)- chemical reactions only
rearrange them

Hantaro didn't think that atoms had nucleus, however
modern scientists proved they did, Hantaro also
that eventually, the electrons would loose charge and
fall back into the center. How this model of the atom functioned and how it was developed. Saturnian Model of the Atom - When Hantaro developed the Saturnian Model, he called it that for a reason. The 'Saturnian Model' means that Hantaro thought that an atom was like Saturn, the planet.
-There was a positively charged center, and rings of electrons orbited around the center, powered by electrostatic force, just like the planet Saturn. Colleagues, Co-Workers and Influences Some people that were influenced by Hantaro and some people who influenced him are; Marie Curie, C.G. Knott, Kotaro Honda and Hideki Yukawa and people and scientists today might not have discovered his view of the atom, which could have led to the misconception that there was no swarm of electrons around the protons and neutrons. He helped ad influenced many after him. Protons, Electrons and Neutrons Protons: A positively charged particle that is located in an atom's nucleus.

Electrons: A negatively charged particle that orbits around the nucleus.

Neutrons: A neutral particle that stays in an atom's nucleus. Thank you and Conclusion The fact that Hantaro Nagaoka discovered this valuable piece of information was very important to all scientists after him who studied atoms and their functions. Thanks a lot for watching and hope you learned something interesting! Bibliography Images - http://en.wikipedia.org/wiki/File:Hantaro_Nagaoka.jpg http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1911/maricurie.html http://www.dummies.com/how-to/content/string-theory-and-the-planetary-model.html http://www.proprofs.com/quiz-school/story.php?title=science-8cumulative--matter-atoms-periodic-tablec http://blacksastrology.blogspot.com/2012/06/saturn-turns-direct-in-libra_24.html http://www.mrripps.info/level/notesindex.htm http://scienceworld.wolfram.com/biography/Nagaoka.html http://1.bp.blogspot.com/-r7kTG-R2IQY/T9DNXMzeqtI/AAAAAAAAAB0/sTf0kBiNGSM/s320/09_ELECTRON3.jpg Information - http://www.japanese-greatest.com/technology/atomic-model.html http://answers.yahoo.com/question/index?qid=20080302113744AApG6TM http://www.springerlink.com/content/p3m51m6273118715/ http://rcclabs.blogspot.com/ http://en.wikipedia.org/wiki/HantaroNagaoka
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