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Niels Bohr Atomic Development
Transcript of Niels Bohr Atomic Development
Electrons (blue circles) - is a subatomic particle with a negative elementary electric charge.
- The atom is a nucleus which has electrons orbiting it.
- Similar to solar system
- Electrostatic forces
- Superseded except for the quantum theory
Nucleus ( middle ) - is the very dense
region consisting of protons and neutrons
at the center of an atom.
Protons (red circles) - is a subatomic particle with the symbol p or p+ and a positive electric charge of 1 elementary charge. One or more protons are present in the nucleus of each atom.
Neutrons (gray circles) – is a subatomic hadron particle which has the symbol n or n0, no net electric charge and a mass slightly larger than that of a proton
Introduced by Niels Bohr (1913) from the Rutherford model (1911), became Rutherford - Bohr model (1913)
Niels Bohr was one of the foremost scientists of modern physics, best known for his substantial contributions to quantum theory and his Nobel Prize-winning research on the structure of atoms.
It was while conducting research for his doctoral thesis on the electron theory of metals that Bohr first came across Max Planck's early quantum theory, which described energy as tiny particles, or quanta.
"Everything we call real is made of things that cannot be regarded as real."
- Niels Bohr
Bohr was working for the Nobel laureate J.J. Thompson in England
when he was introduced to
discovery of the nucleus and development of an atomic model
had earned him a
Nobel Prize in chemistry in 1908.
Under Rutherford's tutelage, Bohr began studying the properties of atoms.
Later in life, he became
president of the Royal Danish Academy of Sciences
, as well as a member of scientific academies all over the world.
In the same year that he began his studies with Rutherford, Bohr married the love of his life,
, with whom he had six sons.
Rutherford's description of Nucleus
Planck's theory about Quanta
Bohr's explanation on
what happens inside an atom
picture of the atomic structure
of his own in the year
Bohr's greatest contribution to modern physics was the
. The Bohr model shows the
atom as a small, positively charged nucleus surrounded by orbiting electrons.
The number of electrons in the outer orbit determines the properties of an element.
Liquid droplet theory
a liquid drop provides an accurate
representation of an atom's nucleus.
an electron can be viewed in two ways,
either as a particle or as a wave, but never
both at the same time.
Bohr's contributions to the study of quantum
mechanics are forever memorialized at the
Institute for Theoretical Physics at
Copenhagen University, which he helped found
in 1920 and headed until his death in 1962.
It has since been renamed the Niels Bohr
Institute in his honor.
Regardless of how one views an electron, all understanding of its properties must be rooted in empirical measurement.
1. Bohr published a theory based on Rutherford's approach.
2. Rutherford presented that the atoms are consisted of positively and negatively charged protons and electrons.
3. With Rutherford's theory, Neils Bohr expanded it.
4. He further explained it by proposing the travel of electrons.
5. He stated that the outer orbits could hold more electrons.
6. Bohr described the way atoms emit radiation.
7. Later on, physicists expanded his theory into quantum mechanisms.
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(n.d.) Neils Bohr - Atomic Model. Retrieve from http://www.rsc.org/chemsoc/timeline/pages/1913.html
(n.d) Atomic Nucleus. Retrieve from https://en.wikipedia.org/wiki/Atomic_nucleus
(n.d) Proton. Retrieve http://en.wikipedia.org/wiki/Proton (n.d) Neutron. Retrieve http://en.wikipedia.org/wiki/Neutron