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Niels Bohr

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May F

on 21 September 2016

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Transcript of Niels Bohr

Bohr's Theories:
He decided that electrons had certain orbits around the nucleus while some orbits were forbidden. This founded quantum physics.
He helped us to better figure out atomic structure in 1911 and quantum theory - which is a branch of physics that involves atoms, photons, and more.
He also theorized that electrons may change from a higher orbit to a lower orbit depending on how much light they absorb.
Niels Bohr's Beginnings
Neils Bohr was born on October 7, 1885 in Copenhagen, Denmark.
He was the second of three children in a wealthy, upper-class family.
His parents cared greatly for their children's education. Neils was home-schooled until he turned 7, when he went to a formal school called the Gammelholm Grammar School.
Sometimes his father brought home some professors from the school at which he worked. The children were allowed to listen to their conversations, which were about science, philosophy, and art.
Three Interesting Facts About Neils Bohr:
By the time he was a teenager he was correcting mistakes in the textbook.
He was also physically very strong. So when he corrected students, which got him in fights, he usually won.
Although his parents both agreed he could become a great scientist, they made sure he was well educated in sports and culturally.
Once, during his studies at college, The Royal Danish Academy of Sciences announced a gold medal would be awarded for the best research paper on ways to measure the surface tension of liquids. He won it, which was an amazing accomplishment for an undergraduate.
Bohr's Model of the Atom
Bohr got to attend J. J. Thomson’s Cavendish Laboratory at the University of Cambridge in England. He arrived there on October 1911. Bohr, who was now 26 years old, made a bad start with Thomson. The first thing he said to Thomson was ,"This is wrong," while pointing to a page in a book written by Thomson.

By the end of 1911, Bohr had met Ernest Rutherford. He asked to transfer to Rutherford's Lab in Manchester University, and Rutherford said yes, as long as Bohr got Thomson's approval first. Bohr soon became interested in Rutherford's model of the atom, specifically the behavior of electrons. He and Rutherford soon became great friends.
Thomson, Rutherford, and Bohr
In 1913, Bohr published 3 quantum papers and his reputation grew greatly. Later, in 1922, he recieved a Nobel Prize, for his work. He also accepted an offer from Ernest Rutherford to return to Manchester in a senior academic research role. World 1 complicated matters there, but he kept working in Manchester from 1914 - 1916. After that he returned to Copenhagen where he became the chair of the University. Later, as quantum theory developed, Bohr and others, including Albert Einstein would have discussions about whether, "God played dice with the Universe". Einstein and Bohr disagreed on this, because while Bohr said no, Einstein said yes.
Personal Family
In 1912, Bohr married Margrethe Nørlund in Copenhagen. They had six sons, one of whom, Aage Bohr would surpass his father's success by winning a Nobel Prize in Physics.
Date Visited
September 15
September 15
The Main Challenge
During the 1930's and 40's Niels Bohr was helping develop a nuclear bomb because of his work in atom structures. Later on many countries started to think about misusing the discovery. Niels Bohr knew the dangers of the bomb and what would happen if the atomic bomb was used incorrectly. So Niels Bohr quit helping develop the bomb. Bohr knew that he had to do something to stop countries from using the bomb wrongly, so he organized the Atoms for Peace Conference to tell the world the extreme dangers of the bomb. Niels Bohr spent the later years of his life finding peaceful uses of atomic energy.
September 15
He explained that each element on the periodic table had chemical properties that were determined by the number and behavior of their electrons.
Neils Bohr recieved 2 other Nobel Prize Awards. One for his discovery of Element 72 called Hafnium, in 1923, and the other for his atomic bomb in 1940.
There is a place located at the Niels Bohr Institute,and it holds extensive archival material documenting the life and work of Niels Bohr.
Niels Bohr died aged 77 of sudden heart failure in his home in Copenhagen on November 18, 1962. His ashes were buried in Copenhagen’s Assistens Cemetery near the graves of his parents and his brother Harald. Margrethe’s ashes were also buried there when she died.
The End!
Neils Bohr
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