Atom History Essay

The Influence of Greek Thought on Modern Science and Mathematics Parallels can be drawn from Greek thought and compared to today’s modern world views. This comparison also brings forth the influences of the Greek philosophies to the world’s contemporary aspects. More specifically, mathematics and science elicit the relationships of

Particles in Atoms The following section will be describing the atom and all of the particles that make it up. It will start off with what protons, neutrons, and electrons are. This will describe where they are in the atom and what their relative sizes respective one another are. This section will end off with the charges of all of these particles and the total number of all of these particles for every element inside of the carbon family. The entire section will be based off of the particles that make up an atom and more details about them such as their location.

| |The Bohr | | |Atomic Model | [pic] The most important properties of atomic and molecular structure may be exemplified using a simplified picture of an atom that is called the Bohr Model. This model was proposed by Niels Bohr in 1915; it is not completely correct, but it has many features that are approximately correct and it is sufficient for much of our discussion. The correct theory of the atom is called quantum mechanics; the Bohr Model is an approximation to quantum mechanics that has the virtue of being much simpler.

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

The History of Atomic Structure What is the atomic structure you may ask? Well, it’s the law stating the structure of an atom. It is composed of a positively charged nucleus containing a certain amount of protons (positive), neutrons (neutral charge), and electrons (negative). The amount of each subatomic particle (proton, neutron, and electron) all depend on what the element is. Now although this statement may seem fairly simple it was most definitely not. People have been studying the atomic structure for more than 300+ years and are still studying it. So after reading this you may wonder who even made this atomic structure up. After hundreds of years of research there is not any one individual who made the structure up but roughly

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.

1. Experimental work of early 20th century physicists challenged/ultimately invalidated Newton’s rational, mechanical conception of the universe* the old view of atoms as the basic building blocks of the material world and Newtonian physics

• From his experiments Thomson established that all electrons are identical and that elements aren’t different because of their electrons but because of how many electrons are present and their formation. (Lucas & Wright, 2001)

Around 2,500 years ago, Democritus and his partner Leucippus were the first ones to develop the atomic theory in written history. Their theory proposed that every kind of matter was made up of tiny particles, which were named atomos, which means that it is indivisible. This meant that Democritus and Leucippus thought there were little particles of everything, but, the next breakthrough in atomic theory wasn’t made until the early 1800s with a french chemist by the name of Antoine Lavoisier, he was the one who came up with the idea of the law of the conservation of mass, which states that matter stays the same even when it changes shape or form. Then, James Dalton said that all matter was made up of atoms, which were indivisible, and unbreakable.

What is an atom? An atom is the basic building block of everything. An atom is made of electrons protons and neutrons and the number of protons determines the element. Back in the 1800’s this whole idea was unknown. In the 1800’s steam was starting to power everything. It became important to know how steam works, so you can learn to use it more effectively. It was this idea that drove Dalton to research the atom.

Japan rejected the Around 1803 John Dalton, an English chemist developed the first useful atomic theory of matter. Amedeo Avogadro, the Italian chemist in 1811 published an article drawing the distinction between the atom and the molecule, which now is known as “Avogadro’s

The studies of chemistry and physics have shaped understanding of the world today. In fact, they have altered the mindset and reasoning of society, leading to an age in which discoveries are consistently being sought after and achieved. However, it must be noted that the origin for the basis of

History of the Atomic Model Paper Philip Wang Over the course of the last 5000 years, mankind’s knowledge has been constantly advancing. Chemistry, a branch of science, has experienced a tremendous leap and expansions since ancient Greek civilization. One of the major breakthroughs in the advancement in Chemistry was the creation of the Atomic theory, which laid a foundation for the modern-day Chemistry and future of science. The Atomic theory introduced the idea of atoms, which are defined as the discrete units of matter. There are five key scientists that significantly contributed to the Atomic model over a span of thousands of years. They are: Democritus, John Dalton, J.J. Thompson, Ernest Rutherford, and Niels Bohr.

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

There are many Scientist that contributed in the investigation of the atom which are: 1- John Dalton 2- Sir William Crookes 3- Wilhelm Rontgen 4- J.J Thomson 5- Max Planck 6- Albert Einstein 7- Ernest Rutherford 8- Neils Bohr 9- James Chadwick 10-Otto Hahn The Discovery of the Atom first came from the Greeks which made a theory “The idea that all matter is made up of tiny, indivisible particles, or atoms, is believed to have originated with the Greek philosopher Leucippus of Miletus and his student Democritus of Abdera in the 5th century B.C. (The word atom comes from the Greek word atomos, which means “indivisible.”)” (InfoPlease Atomic theory)