In order to fully understand how nuclear weapons work, it is crucial to first understand the basic atomic structure of an atom. The discovery and contribution of the atom formed the foundation of modern nuclear weapons. Along with that comes the generation of electricity through the use of nuclear power. A Greek dilettante by the name of Democritus was known to be the first to theorize the atom as the universal building blocks of all things during the fourth century B.C. He was amplifying an earlier notion by his mentor and philosopher Leucippus. Democritus proposed a concept that of a pixilated world made up of invisible tiny basic balls of matter that were impossible to split. These tiny balls he called, “atoms,” which means indivisible. This is where the concept of the atom was first conceived. Most of Democritus’s writings were ignored and none survive today in their original form due to being disliked by Plato. Although, some believe that he was the father of modern science.
In 1808, an English school teacher and scientist named John Dalton proposed a modern atomic theory. Dalton suggested the idea of the atom as being the smallest particle or building block that created all other materials that is around us. He developed the idea, but he was not sure what role they played in environment and other objects. The introduction of his theory led scientist to independently come up with their own idea of the existing small particles; with positive and negatively charged electrons that keep the matter together. These positive and negatively charged electrons, which are now known as protons and electrons; which will further be discussed more in this paper, were only acknowledged after the discovery of the atom This was an amazing di...
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...-238 is used as a tamper/ reflector to minimize the escape and capture of neutrons.
Depending on what happens to the free neutron produced, different types of chain reaction results in different uses. For a nuclear power reactor, a sustaining chain reaction is required. It’s where the number of neutrons does not increase or decrease; it remains constant. To get the most yield from a nuclear weapon and to increase its efficiency, you need more neutrons.
Works Cited
http://en.wikipedia.org/wiki/Leucippus http://science.howstuffworks.com/atom1.htm http://discovery.yukozimo.com/who-discovered-the-atom/ http://www.atomicarchive.com/Fission/Fission1.shtml http://lc.brooklyn.cuny.edu/smarttutor/corc1322/ASIntro.html http://www.english-online.at/science/atoms-and-elements/atoms-and-important-chemical-elements.htm http://www.cddc.vt.edu/host/atomic/trinity/trinity1.html
Physicist in the 1900 first started to consider the structure of atoms. The recent discovery of J. J. Thomson of the negatively charged electron implied that a neutral atom must also contain an opposite positive charge. In 1903 Thomson had suggested that the atom was a sphere of uniform positive electrification , with electrons scattered across it like plum in an pudding. (Later known as the Plum Pudding Model)
Dalton’s atomic theory, which stated “the atoms were tiny, indivisible, indestructible particles” (Bender), differed drastically from that of the Greeks’ in that it “wasn’t just a philosophical statement that there are atoms because there must be atoms” (Bender). Although Aristotle believed that there are four terrestrial elements, earth, water, air, and fire, Democratus believed that “a piece of a substance can be divided into smaller pieces of that substance until we get down to a fundamental level at which you can’t divide the substance up and still have pieces of that substance” (“Atoms”). Aristotle’s theory was popular, but incorrect; Democratus’s was closer to our current theory, yet he remained relatively unpopular and obscure. This demonstrates of the key way in which a personal point of view can, in fact, retard the pursuit of knowledge. The scientist with the better oratory abilities has his theories more widely accepted. Dalton’s own theory, which extrapolated upon four basic
physics. The work of Ernest Rutherford, H. G. J. Moseley, and Niels Bohr on atomic
Atomic weapons were used in the Pacific against Japan. President Truman has several different reasons for using the atomic bombs, such as signaling to the Russians, accelerating the end of the war, revenging for Pearl Harbor attack, etc. I believe the atomic bombing of Japan was necessary to end the war quickly as well as the stop the advance of Russia into Asia. At that time, the Russians had a plan to spread their influence and take territory in Asia. The atomic bombing put a stop to their expansion. It could also be considered as a threat to other belligerent countries because of its extremely destructive power. The explosion was a warning to those who wanted to attack or declare war on the United States. Also, it might help relieve Americans’
According to Merriam-Webster, nuclear fission is defined as “the splitting of an atomic nucleus resulting in the release of large amounts of energy” (Nuclear Fission). In the book Remembering the Manhattan Project: Perspectives on the Making of the Atomic Bomb and Its Legacy, Richard Rhodes, an American journalist and historian, states that fission was essentially discovered by accident. On December 21, 1938, German physicists, Otto Hahn and Fritz Strassman, were performing an experiment in which they bombarded uranium atoms with neutrons (Rhodes 17). They saw that this procedure created mutated atoms that had strange characteristics. Hahn and Strassman found that the neutrons split the nuclei of the uranium in half producing radioactive barium and krypton (Rhodes 18). Rhodes explains that the physicists observed that the reaction was extremely exothermic, producing about ten times the energy needed for the fission to occur. After publishing their findings, physicists all over the world recreated the experiment. After conducting his own fission experiment, Enrico Fermi, an Italian physicist at Colombia University, said, “A little bomb like that and it would all disappear” (qtd. Rhodes 19). Many of the world’s physicists came to the same conclusion; this reaction could be used to develop an atomic weapon. According to Rhodes, this discovery made the development of atomic weaponry seem essential to many countries because the only way to defend themselves against atomic weapons was to have similar weapons of their own.
Out of all the dangerous powers and authority our government wields, possibly the most threatening powers are nuclear weapons. People tend to be frightened by things they do not understand, which make nuclear weapons a perfect catalyst for fear. These weapons have the most overwhelming and destructive power known to man; although, nuclear weapons are only safe in countries that try to maintain harmony and stability. Nuclear weapons are defined as “explosive devices whose destructive potential derives from the release of energy that accompanies the splitting or combining of atomic nuclei.” This power is both dangerous and unstable in the hands of small erratic countries.
Technology has allowed for the furtherance of warfare, from the invention of gun powder to the splitting of the atom. These findings have propelled the leap of numerous nations’ in the ability to wage war against each other. Of these discoveries, the splitting atom spawned an invention that would hurl the world from conventional warfare into the nuclear age. These ideals were the brainstorming of some of the greatest minds in America and abroad. These scientists began to formulate the creation of the atomic bomb, a device that would change the world in ways that had never been imagined before.
They new the structure and particle makeup of atoms, as well as how they behaved. During the 1930Õs it became apparent that there was a immense amount of energy that would be released atoms of Gioielli 2certain elements were split, or taken apart. Scientists began to realize that if harnessed, this energy could be something of a magnitude not before seen to human eyes. They also saw that this energy could possibly be harnessed into a weapon of amazing power. And with the adven...
This showed that dissolved gases were mechanically mixed with the water and weren?t mixed naturally. But in 1803 it was found that this depended on the weight of the individual particles of the gas or atoms. By assuming the particles were the same size, Dalton was able to develop the idea of atomic weights. In 1803 this theory was finalised and stated that (1) all matter is made up of the smallest possible particles termed atoms, (2) atoms of a given element have unique characteristics and weight, and (3) three types of atoms exist: simple (elements), compound (simple molecules), and complex (complex molecules).
The Atomic Theory began in roughly 400BC with Democritus in Ancient Greece and is universally believed to be correct today. Democritus who was born in 460 BC and died 370 BC and is known as the father of modern science. Democritus proclaimed that everything is made up of atoms. He continued his theory to say that atoms will always be in motion, between atoms there is empty space, atoms are unbreakable, there are an infinite number of atoms all different sizes and shapes. He also said that iron atoms are solid and strong and have hooks to lock them together, water atoms are smooth and slippery, salt atoms have sharp jagged edges because of its taste and air atoms are light and spiralling.
In 1934 it was known that atoms consisted of a nucleus, containing protons and neutrons, surrounded by electrons. It was also known that certain nuclei were radioactive. Radioactive nuclei emit alpha particles, which are pieces of nuclear matter containing two protons and two neutrons. After the alpha particle leaves the nucleus radium is changed into radon. If the radon gas is combined with several grams of beryllium then neutrons are found to be emitted. When the alpha particle enters a beryllium nucleus it provides enough kinetic energy for a neutron to burst out, leaving behind a carbon nucleus in the process. It was later determined that this energy could be harnessed by a nuclear reactor and used for power.
In 1945, when the Americans bombed Hiroshima, Japan, approximately 140,000 men and women were instantly killed by the effects of American nuclear defense. With such extreme brutality and force how many people must die for one to finally realize the strengths of nuclear bombs and what damage they can cause. Nuclear weapons should be outlawed because they kill thousands of innocent humans at a time, destroy the environment, and inviolate human’s right to moral and personal freedoms.
The next big step in the discovery of the atom was the scientific test that proved the existence of the atom. After the discovery of the atom we had the discovery of subatomic particles. With the discovery of the subatomic particles came the research, which came from experiments that were made to find out more about the subatomic particles. This research is how we uncovered that most of the weight of an atom is from its nucleus. With the gold foil experiment, tested by Ernest Rutherford, he discovered the existence of the positively charged nucleus. He proved this when the experiment was happening, a small fraction of the photons th...
Things are very different from each other, and can be broken down into small groups inside itself, which was then noticed early by people, and Greek thinkers, about 400BC. Which just happened to use words like "element', and `atom' to describe the many different parts and even the smallest parts of matter. These ideas were around for over 2000 years while ideas such as `Elements' of Earth, Fire, Air, and Water to explain `world stuff' came and went. Much later, Boyle, an experimenter like Galileo and Bacon, was influenced much by Democritus, Gassendi, and Descartes, which lent much important weight to the atomic theory of matter in the 1600s. Although it was Lavoisier who had divided the very few elements known in the 1700's into four different classes, and then John Dalton made atoms even more believable, telling everyone that the mass of an atom was it's most important property. Then in the early 1800's Dobereiner noted that the similar elements often had relative atomic masses, and DeChancourtois made a cylindrical table of elements to display the periodic reoccurrence of properties. Cannizaro then determined atomic weights for the 60 or so elements known in the 1860s, and then a table was arranged by Newlands, with the many elements given a serial number in order of their atomic weights, of course beginning with Hydrogen. That made it clear that "the eighth element, starting from a given one, is a kind of a repeat of the first", which Newlands called the Law of Octaves.
Scientists from earlier times helped influence the discoveries that lead to the development of atomic energy. In the late 1800’s, Dalton created the Atomic Theory which explains atoms, elements and compounds (Henderson 1). This was important to the study of and understanding of atoms to future scientists. The Atomic Theory was a list of scientific laws regarding atoms and their potential abilities. Roentagen, used Dalton’s findings and discovered x-rays which could pass through solid objects (Henderson 1). Although he did not discover radiation from the x-rays, he did help lay the foundations for electromagnetic waves. Shortly after Roentagen’s findings, J.J. Thompson discovered the electron which was responsible for defining the atom’s characteristics (Henderson 2). The electron helped scientists uncover why an atom responds to reactions the way it does and how it received its “personality”. Dalton’s, Roentagen’s and Thompson’s findings helped guide other scientists to discovering the uses of atomic energy and reactions. Such applications were discovered in the early 1900’s by using Einstein’s equation, which stated that if a chain reaction occurred, cheap, reliable energy could b...