Mohammed Kabir
Period 3October 8, 2014
The Atomic Theory
If I had to give out Nobel Prize to three of the scientists from my research, I would have to make a pretty tough choice. Should I choose who made the biggest discovery? Or should I choose the person who began the idea? My choices were Niels Bohr, John Dalton, and James Chadwick.
I chose Niels Bohr because the Bohr model is widely used today. Bohr discovered that the nucleus contains the protons and the electrons orbit around the nucleus. This is also compared to the planets orbiting around the sun. Bohr’s discovery was very important. He was the first to discover that electrons ravel in separate orbits. He also found out that the number of electrons in the outer orbit determines the properties of an element. Bohr’s contribution is very important and his model is used still today with modifications. Niels Bohr definitely deserves a Nobel Prize.
Second, I would give the Nobel Prize to John Dalton. John Dalton had many theories which were true. He said that all matter is made up of atoms. He also said that if two or more different elements combined they would form a compound. He also said that atoms of a given element are identical in mass and properties. Dalton’s many theories show that he deserves a Nobel Prize in my opinion.
Finally I would give the Nobel Prize to James Chadwick. He picked up on Curie’s evidence to create his own theory. He was able to give a reason for why the particles would beam with high
Atom History Essay An Atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The Atom was theorized by a man named Democritus of Abdera, Thrace in between c.a 460 BC - ca. 370 B.C. Atom is derived from the Greek word “atomos” , which means to be uncuttable. He had a theory that everything is composed of “atoms”, which he believed that these minuscule objects are indivisible, indestructible and have and always been in motion…
states that all matter is made of atoms. The second point is that atoms of the same element have the same mass and properties. The third point is that atoms cannot be created or destroyed. It also states that compounds are formed by a combination of two or more different kinds of atoms. The fifth point is that a chemical reaction is a rearrangement of atoms. Dalton’s theory is still valid in modern chemistry. Today we know that there are different kinds of atoms differing by their masses within…
Physical Science T2 Atomic Theory (portfolio) Current Atomic Theory • According to the modern atomic theory, most of an atom is empty space. An atom consists of a small, dense nucleus surrounded by electrons. Atoms contain three types of subatomic particles: protons, neutrons and electrons. The nucleus contains only protons and neutrons. • Protons are particles with a positive charge. • Neutrons are particles with a neutral, or no, charge. • Electrons are particles that orbit around the nucleus…
since this theory persisted as reality for 2000 years. After him another came by the name of Democritus. He considered that matter could not be divided and that it had to consist of small particles. He then began to recognize things to be made up of atoms as he called them from the greek word of atomos, which meant indivisible. 1800-1810: As the new era began a man named John Dalton began the age of scientific developments in what looks to be as one of the most influential years for science…
Arrangement of Electrons in Atoms Review Rutherford - Gold Foil Experiment Discovered the nucleus - a hard dense small center of the atom containing the _______________ and _______________ Most of the atom is empty space in which the _______________ move randomly throughout Rutherford did not explain how the electrons filled the empty space surrounding the nucleus. The Development of a New Atomic Model I. Properties of Light A. _______________Description of Light i. Electromagnetic _______________…
used for identifying the atomic and molecular structure of a crystal, in which the crystalline atoms cause a beam of incident X-rays to diffract into many specific directions. By measuring the angles and intensities of these diffracted beams, a crystallographer can produce a three-dimensional picture of the density of electrons within the crystal. From this electron density, the mean positions of the atoms in the crystal can be determined, as well as their chemical bonds, their disorder and various…
"The Atom" The glory of the atom begs a reverent word The primary design of the whole universe Yeah, let us sing its praises, let us bow our heads in prayer At the magnificent consciousness incarnate there The smallest unit of matter with its orbiting electrons Echoing off the solar system like a hawk in the hills at dawn The smallest unit of matter Uniting bird and rock and tree and you and me Oh, holy is the atom, the truly intelligent design To which all of evolution is graciously…
combined with other chemical elements. If you had a certain amount of uranium, a certain number of uranium atoms, then you got a certain intensity of radiation. Nothing else made a difference. Normal properties, color or smell or hardness, changed according to how you treated a substance. Scientists of the time knew that such properties came from the way atoms combined with one another. The atoms themselves, most scientists believed, had all been created at the beginning of time, and could not possibly…
nuclear reaction in the brilliant stars is the carbon-nitrogen cycle, while the sun and fainter stars use mostly the proton-proton reaction. Bethe's main achievement in this connection was the exclusion of other possible nuclear reactions. The Nobel Prize was given for this work, as well as his work on nuclear reactions in general. Before his work on nuclear physics, Bethe's main was on atomic physics and collision theory. In collision theory, he developed a simple and powerful theory…
Though his experiments Thomson discovered that the strange particles he found had a negative charge. Which proved Dalton’s theory of an atom wrong, that the atom was filled with equal negative and positive charges. In 1906 ,being the first to use mass spectrometry, he started studying positive rays, which led him to discover that neon was composed of two different kinds of atoms. Another theory J.J. Thomson proposed was the idea of the Plum Pudding model, (Chocolate chip model or the Blueberry muffin model…
