Essays on Atom

Connex Atom Notebook
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Laptops offer a ton of benefits to computer users everywhere that desktops simply can’t provide. While you may have to sacrifice a little power or up your budget a little bit to get exactly what you want, in the end it is all worth it as you will take home a computer that is complete and ready to be used without having to spend time connecting a bunch of different wires to it just so you can turn it on…...
AtomFacebookInternetPhotoshop
The history of the atom
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Over the span of hundreds of years science has advanced tremendously improving our understanding of what makes up the world we live in. The atom is one of sciences important findings and has had a changing history of new discoveries, always altering the way we see things. In the early 1800s a man called John Dalton made an atomic theory with predictions about atoms. He stated that atoms are tiny particles that make up elements and that they are indivisible.…...
AtomAtomic TheoryHistory
Relative atomic mass
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The electron was the first particle to be discovered by J J Thomson, who was looking into passing an electric current through gases. At the positive end of the tube a glow was visible. This glow could be deflected by both electric and magnetic fields, suggesting that there were rays of negative particles travelling from the cathode to the anode. These particles are obviously electrons. Thomson went on to suggest that atoms were like plum puddings with negative electrons embedded…...
AtomNature
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Energy and Semiconductors
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Semiconductors usually have four electrons in the outer electron shell. They are tetravalent. These are called valence electrons. The structure that is formed is a tetrahedral structure. This forms a crystalline structure. There are two types of semiconductors. One type is the intrinsic semiconductors and the extrinsic semiconductors. Intrinsic semiconductors are elements and compounds that are semiconductors. Examples include Silicon and Cadmium. When they are in a solid state, the silicon atoms form a covalent bond among themselves to form…...
AtomEnergyNature
Determination of the relative atomic mass of magnesium by back titration
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In this following experiment, we are aiming to determine the relative atomic mass of magnesium, using a process known as 'back titration'. The basic outlines of this experiment include a strip of magnesium being allowed to reach with excess hydrochloric acid. The excess acid is then determined by titration with a standard alkali (Sodium Hydroxide) and hence the moles of acid that reacted with the magnesium is found by difference. This can be used to determine the number of mole…...
AtomExperimentTitration
Characteristics of Ohmic and Non Ohmic Conductors
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Every part of matter is made up of atoms. Atoms are called the building blocks of nature. These atoms consist of a nucleus and shells. The protons and neutrons are part of the nucleus and the electrons are distributed in shells around the nucleus. The protons have a positive charge, neutrons are not charged and the electrons are negatively charged. Electrons have no overall mass while neutrons and protons both have a mass of 1 unit. This is how the…...
AtomCharacterChemistry
Brief History of the atom model
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The roots of atomic theory can be traced back over 2000 years ago to the ancient Greeks. The Greeks were responsible for many advancements in civilization, but one of the things that drove them was the question of origin. Who are we? What are we made of? Where did we come from? These questions were not limited to humans, but to all matter in the world. Around 400 BC a philosopher named Democritus proposed a theory of composition of matter.…...
AtomAtomic TheoryHistoryThe Alchemist
Atomic Force Microscope Operating in Parallel
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Abstract Atomic force microscopy (AFM) has advanced to be one in every of the foremost powerful tools for the characterization of material surfaces particularly on the nanoscale. It is a vital Nano instrument technique for several applications such as cell biology and nanoelectronics metrology and inspection. The utilization of a single AFM instrument is understood for its very low speed and not appropriate for scanning massive areas, leading to very-low-throughput measurement. Parallelizing AFM instruments will be presented to overcome those…...
AtomForceTechnology
Formal Report for Experiment
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Experiment#14: Spectroscopy of Cobalt II Ion Purpose: The purpose of the experiment was to preparation of a standard solution, quantitative dilutions, and use of a spectrometer to determine an absorption spectrum and a Beer’s law plots. In the learning object of light, we know about the structure of atoms and molecules come from learning our interaction with light. The light may be considered to have both wave nature and particle nature. A photon is the basic unit of light that…...
AtomExperimentLight
Atomic Theory Timeline
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Atomos Democratus, 460 b.c. Billiard Ball Model John Dalton, 1808 Plum Pudding Model J.J. Thomson, 1904 Planetarium Model Ernest Rutherford, 1911 Bohr Model Niel Bohr, 1913 Refined Bohr Model Niel Bohr, 1920's Electron Cloud Model Erwin Schrödinger, 1930's New Quantum Model Albert Einstein, 1930's...
AtomAtomic TheoryWorld Wide Web
Chemistry Exam 3 (Atomic Theory)
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The wavelength of some green light is 530.0 nm. What is the frequency of this green light? 5.66 x 10^14 hz Microwave radiation vs. UV radiation Which has a longer wavelength? Which has a greater frequency? Which has greater energy? Microwave UV UV Microwave ovens emit microwave energy with a wavelength of 12.1 cm. What is the energy of exactly one photon of this microwave radiation? 1.66 x 10 ^-24 J A certain shade of blue has frequency of 7.32…...
AtomAtomic TheoryChemistryLight
Bean Bag Isotope: Abundance and Atomic Mass Lab
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A new atomic theory, in which all atoms of the same element are identical to one another and equal in mass, was proposed by the scientist Dalton. Although the theory had its flaws and was simple, it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon, isotopes were discovered, as atoms of the same element which have been built up to have different masses. Purpose The purpose of this…...
AtomAtomic TheoryRadioactivity
Laboratory Report : Flame Colors of Metals
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Abstract The experiment about flame color of metals demonstrates how electrons jump into their excitedstate from their ground state as it came in contact with heat. As it return to its lower energy state,it emits the absorbed energy in the form of light. A platinum or nichrome wire was dipped into aconcentrated HCL and was heated to clean it. The wire was dipped into different salt solutionsand heated in order to determine the metallic ion’s color and wavelength. Metal ions…...
AtomHow It Feels to Be Colored Me
Periodic Table Trends
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When you consider a periodic table, you think of aspects like oxygen, neon, lead, and iron. You may even believe of numbers, rows, and columns. You may not think of trends that are taking place throughout a periodic table. There are several trends that go on in a periodic table. The patterns that I am going to be explaining throughout this paper are atomic mass, atomic radius, first ionization energy, and electronegativity. When you study a normal/ordinary table of elements,…...
AtomPeriodPhysics
The atoms or molecules
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A substance in a solid phase is relatively rigid, has a definite volume and shape. The atoms or molecules that comprise a solid are packed close together and are not compressible. Because all solids have some thermal energy, its atoms do vibrate. However, this movement is very small and very rapid, and cannot be observed under ordinary conditions. There are four types of crystalline solids : Ionic solids-- These substances have a definite melting point and contain ionic bonds. An…...
AtomDensityForcePressure
The dropping of the atomic bombs on Japan
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In August 1945 the world changed. Two American atomic bombs were dropped on Japan with devastating effects. On the 6th of August 1945, the Enola Gay, a B- 29 Superfortress plane, dropped the atomic bomb "Little Boy" on Hiroshima. This single bomb killed 80,000 people immediately and about 60,000 more within six months. On August 9, a second atomic bomb that ultimately killed about 70,000 people was dropped on Nagasaki. The dropping of these nuclear bombs is perhaps one of…...
AtomAtomic BombJapan CountryWar
Short Summary Essay on the Big Bang
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The Big Bang theory is today's dominant scientific theory about the origin of the universe. It states that the universe was created from an infinitely hot and dense subatomic ball, which once exploded not only created energy and matter, but space and time itself. This is estimated to have happened around 14 billion years ago. 300,000 years after the big bang took place the plasma of elementary particles had cooled to 3000K, during which atoms began to form as electrons…...
AtomBig bang theoryLightUniverse
SCH4U Exam Study Notes
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Electron configuration: notation that shows number and arrangement of electrons in its orbitals Infinite number of electron configurations because infinite values of n For each atom, all but one of these represents the atom in an excited state Atom’s chemical property mainly associated with its ground state electron configuration Unless otherwise stated, assume electron configuration is in its ground state Ex: 1s2 (superscript represents 2 electrons in s orbital) Aufbau principle: process of building up the ground state electronic structure…...
AtomChemistryScience
Atoms, Molecules and Elements
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Atoms, molecules and elements are the building blocks of everything we can see, hear, and touch. Though not visible to the naked eye, it is the combination of millions of these tiny substances that make us who and what we are today. Many elements make up the world around us, and each element reacts differently to its surroundings. The definition of reactivity as pertained to chemistry states, “The relative capacity of an atom, molecule, or radical to undergo a chemical…...
AtomScience
Research Using MRI and X-ray
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Many people argue that the high cost of research outweighs its potential benefits. Provide one argument for and one argument against increasing current funding for atomic-structure research. Use specific examples from this lesson in your answers to support each position. The use of the MRI (magnetic resonance imaging) machine is a topic of debate with arguments for and against its use of this machine for medical purposes. An argument that supports the use of the MRI is that research in…...
AtomResearchScience
DBQ Atomic Bomb
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In August of 1945, the United States launched two atomic bombs on Japan; the first, in Hiroshima on August 6, and the second in Nagasaki a few days later. Despite the obvious diplomatic advantage to implementing one of the most intimidating weapons of that time, the United States’ tactics and goals behind dropping the atomic bombs were purely military oriented; the political benefit was merely an added bonus. The atomic bomb was necessary due to the Japanese’s refusal to surrender…...
AtomAtomic BombInternational RelationsMilitary
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