Niels Bohr Accomplishments

He soon was recognized and got a job as a physicist. He was recruited by MIT to work on a project. When he was working, he invented the first

Refined the atomic model- founding the Bohr atomic model which consists of electrons orbiting around the nucleus and chemical properties being determined by the number of electrons in the outer orbits.

His work helped to contribute to the modern understanding of the atomic theory. Thus, at the points A B C and D the electron would be subjected to maximum repulsive and attractive forces while the positions a b and c would be stable But once disturbed from one of the latter positions the electron would oscillate for a while and finally shift over into a new position of equilibrium At the distance OE the curve representing the force exerted on the electron would become practically the same as that corresponding to Coulomb's law Such a law of force might thus explain radiation phenomena and perhaps the raison d etre of the constant h in the quantum theory. In 1905 Albert Einstein was the next scientist to contribute to the atomic theory findings. His work on the theory of relativity became the basis of nuclear energy. In 1909 came the following important discovery, the discovery of the nucleus. Ernest Rutherford started to form an idea of the structure of an atom. Rutherford used the scattering of alpha particles when shot through gold foil to discover the structure of an atom, he called this experiment the gold foil experiment. Rutherford also decided to call Thompson’s + particles protons. P+ is another symbol that means

Ernest Rutherford was a New Zealand born British physicist who is famously known for “splitting the atom.” His work on the gold foil experiment contributed greatly to the model of the atom and helped develop the standard model of the atom to what we now use today. Without his contributions we would still be using the Plum Pudding model, an out dated and incorrect model, and we would have less of an understanding of how atoms form the world around us.

Thomson did many experiments and found that the mass of one of these electrons was nearly 2000 times lighter than the element Hydrogen. Thomson then disproved Dalton in stating that atoms cannot be divided into smaller pieces. (Born,

His first life accomplishment was about a book. At age twenty-seven, he released a five hundred page textbook called Organic Chemistry. The book won Demidov prize and put him in front of Russian chemical education. In 1867, at age thirty three, he was awarded Chair of General Chemistry. Everybody admired that he changed a difficult branch of chemistry into a logical science. His nomination for the 1906 Nobel Prize failed by one vote. In 1876, he was officially named Professor of General Chemistry at the University of St. Perersburg. After resigning in 1890, he was officially named Director of Bureau of Weights where he stayed until his death in 1907. In 1905, the British Royal Society gave him the Copley Medal, its highest honor! Also in 1905, he was elected to the Royal Swedish Academy of Sciences. Mendeleev’s law was soon discovered after those three elements were found. Not surprisingly, he was remembered as a brilliant scholar, an inspiring teacher, and an amazing writer. He next began a book for organic chemistry. His books, Principles of Chemistry, with two volumes, became standard until the early 20th

Within the last hundred years, the atomic model gone through dramatic changes allowing to apply the knowledge of matter understanding at atomic level into different industries like medicine such as MRI and X-Ray. This knowledge allowed doctors to treat, diagnose and certainly save millions of people throughout the years, which could not have been done without research being done on the structure of the atom funded continuously for these scientists to find more application which benefit people and comprehend the world we live in on an atomic level.

At the beginning of the twentieth century a scientist called Albert Einstein had a special theory about atoms. His theory was that atoms had a lot of energy locked within them. After this theory was published scientists worked hard to prove that this theory was true. After thirty years of experiments they discovered that within the nucleus there is a lot of energy and splitting the atom would release it.

“By 1687, he had theorized that gravity was a force that could hold objects, such as the moon, in orbit around the Earth, and he worked out equations to prove it” (Challenging Limits). He then calculated the laws of motion that held the planets in their orbits around the sun. Along with his research, he invented calculus, the method for working out the speed of an object at any given moment during its path. By the 20th century, scientist could demonstrate atoms and the tiny charged particles they contained called electrons. The electrons are virtually invisible, but Leeuwenhoek used them from an electron microscope that magnified ten million times. Allowing future scientist to develop the MRI scanner, a precise diagnostic tool used to learn about the work of the brain. In addition to the discovery of atoms and their electrons, a physicist by the name of Albert Einstein formulated the theorem E=mc2. Stating that energy resided in matter itself. With this, scientist learned that atoms are our greatest repository of energy. Scientist began to ask if they themselves, “if we could split atoms, could we release the new, limitless supply of energy” (Challenging Limits)? Soon, scientist did split atoms that released massive surges of energy, but also produced lethal radioactivity. This groundbreaking discovery provided a possible solution to what created the

Before really discussing what atoms were, why they are important, and so on. We began talking about the scientists that contributed to the study of atoms. The main scientist that we discussed were Democritus, Rutherford, Thomson, Bohr, Dalton, Heisenberg, and Chadwick. Prior to taking chemistry I only knew about Democritus, the Greek philosopher who developed the modern atomic model, and Dalton, who further developed Democritus’s model of the atomic model, but I wanted to know more about the other scientist. That night I went home and did research on the other scientist. This led me to finding out very interesting information on the other scientist and having a deeper understanding on what part of their research is still relevant today. The extra research I did on the scientist was a just a small scale example of talking my education into my own hands and getting a deeper understanding of particular

Bohr is well known for his amazing research on the structure of the atom, he thought that maybe the hydrogen atom was based on the quantum theory that energy can only be transferred in one way, and he also thought that E. rutherford model had some problems, so he fixed

Ernest Rutherford was born August 30th, 1871, on a farm in New Zealand. He was the fourth child born out of his twelve siblings. Before he started to make mass discoveries in the world of science, he got his degree from the University of New Zealand and began to teach. After teaching for awhile, Rutherford got a scholarship to Cambridge University in England to be the first graduate

The atomic model that was accepted by the scientific community before Rutherford's experiment consisted of a group of positive charge surrounded by electrons to balance the negative charge of the electrons. In Rutherford's experiment, he found that there was a center to atoms, later to be named the nucleus. Rutherford created his own model after stating that Thompson's was incorrect.

“Brilliant Phoebe, he also discovered that there was negative charges in atoms called electrons.” Ms. Frizzle responded. “Ernest Rutherford was another person who conducted an experiment, it was called the gold foil experiment.” Ms. Frizzle added.

Leo Szilard was born on February 11, 1898 in Budapest, Austria-Hungary. His father was a civil engineer, and Szilard decided to follow in his father’s footsteps. In 1916, he went to college at a technical university in Budapest for a year before he joined the Austro-Hungarian Army. In 1917, Szilard was saved from going to the front lines by an unknown illness. After the war in 1920, he went to school at the Technische Hochschule in Charlottenburg, Germany. He studied physics with famous physicists Albert Einstein, Max Planck and Max Von Laue. After studying with Einstein, they became close friends. He went far with his academics in Germany, but eventually moved from Germany to London due to the rise of the Nazi Party in 1933 and then