HANTARO NAGAOKA:

A JAPANESE PHYSICIST

By: Makayla Jones

1904

BORN: AUGUST 15, 1865 IN NAGASAKI, JAPAN

DIED: DECEMBER 11, 1950 IN TOKYO, JAPAN

SATURNIAN ATOMIC MODEL

Created the Saturnian Atomic Model which was the idea that in the nucleus there were protons and surrounded by the nucleus were electrons.

Author: James Trefil, Atom, Encyclopedia Brittanica http://www.britannica.com/EBchecked/topic/41549/atom/48356/Discovery-of-radioactivity Date: September 4, 2014

PRESENTED HIS WORK

He presented his work at the Tokyo society for mathematics and physics in 1903.

He also announced it in the British academia journal “Philosophical Magazine.” Author: Unknown. Hantaro Nagaoka.

http://http://www.japanese-greatest.com/technology/atomic-model.html February 27, 2008

WHY HE STARTED

He sparked an interest in atomic physics after he heard Marie Curie give a lecture on radioactivity in 1900.

"Nagaoka, Hantaro." Complete Dictionary of Scientific Biography. 2008. Retrieved December 03, 2014 from Encyclopedia.com: http://www.encyclopedia.com/doc/1G2-2830903102.html

ELECTRONS OUTSIDE AN ATOM Nagaoka was one of the first to

propose the idea that negatively-charged electrons are located on the outside of the atom.

Also one of the first to propose protons in the nucleus.

Author: Vincent Luu, Discovering the Atom, http://discoveringtheatomvincent.weebly.com/hantaro-nagaoka.html Date: December 3, 2014.

RENOUNCING HIS MODEL He abandoned the Saturnian Model in

1908 after there wasn't enough experimental proof to support the model and disprove speculation.

Author: Klaus Hentschel, Atomic models, Nagaoka’s Saturnian Model, link.springer.com/chapter/10.1007%2F978-3-540-70626-7_10 , Date: 2009