• Covalent Bond Atoms Groups Molecules
    439 words
    Bio-molecules are built by assembling atoms, by virtue of covalent bonds. The most collective elements that can be discovered in bio molecules are the CHOPS element, which stands for the basic abbreviation of carbon, hydrogen, nitrogen, phosphorus, and sulfur. Each one of these elements has a specific valence. A valence resolves the number from the covalent bonds it can be able to form. Presuming on the total of electrons in the exterior shell that decides the ability of an atom to connect with ...
  • Molecular Structure Formal Charge
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    Molecular Structure Lab Objective: For this experiment we took two different molecule and virtually dissected them finding everything about them including: bond length, bond angles, the charge on each atom, the non bonded distances between atoms and the energy difference between the highest and lowest molecular orbital. Procedure: The procedure is to use Hyper Chem Lite to get the information needed from each molecule. But explained in full on page 16 and 17 in the lab manual. Data: The followin...
  • The Evolution Of The Atomic Theory
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    The Evolution of the Atomic Theory Rob CongroveB 4 10/23/00 The five atomic theory's of the past two centuries represent the sudden advancement of science in modern times. Begining with a basic theory on the behavior of atoms to the current model, some changes have been made, and some ideas are still the same. Ancient Greek philosophers be lived that everything was made up of invisible particles called at mos. Since then the theory of atoms did not progress untill 1803. John Dalton was the first...
  • Bose Einstein Condensation Atoms Atom Condensate
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    Everything in the world around us is made up of particles. These particles can be placed into two categories called bosons and fermions. Bosons are particles that have integer spin values, such as 1, 2, 3 and so on. 3 Examples of bosons are photons, which are quantum of electromagnetic radiation, phonons, which are quantum of vibrational energy, and most atoms. Fermions on the other hand are particles that have half-integer spin values, such as 1/2, 3/2, 5/2 and so on. 3 Fermions are the most c...
  • John Dalton Weights And Weight Relations
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    John Dalton John Dalton was a great help to modern day chemistry. He was born in 1766 in the small town of Eagles field, Cumbria, NW England in the UK. He was a chemist that stated an atomic theory of matter, which is now the theory of modern day chemistry. Besides his theories, he published the first major book of the studies of color blindness; which affected him. The book was published in 1794. He first stated his theory in 1803: that each chemical element is composed of its own kind of atom...
  • Atomism Democritus And Epicurus
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    Atomism: Democritus and Epicurus Philosophy 116 October 17, 1996 In the Atomists, we see pluralism taken as far as it could possibly go. We see Democritus and Epicurus divide all the world, as well as the universe, into two categories; atoms and empty space. Everything else is merely thought to exist. The atoms are eternal, infinite in size and number and they a removing through the empty space. There is no motion without empty space. Both Democritus and Epicurus agreed that motion was impossib...
  • The Development Of The Atomic Theory
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    The Greek concept of atomos: the atom Around 440 BC leucippus of Miletus originated the atom concept. He and his pupil, Democritus of ab dera refined it for future use. Their atomic idea has five major points. All original writings of leucippus and Democritus are lost. The only sources we have for there atomistic ideas are in quotations from other writers. Democritus was known as the "laughing philosopher" because he enjoyed life so much. At this time Greek philosophy was about 150 years old, e...
  • Excited State Atoms Energy Laser
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    The Laser/Atom Connection A laser is a device that controls the way that energized atoms release photons. Laser is an acronym for Light Amplification by Stimulated Emission of Radiation, which describes very succinctly how a laser works! Although there are many types of lasers, all have certain essential features. In a laser, the lasing medium is "pumped" to get the atoms into an excited state. Typically, very intense flashes of light or electrical discharges pump the lasing medium and create a ...
  • The Atom Ground State
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    An atom is the smallest unit of matter that is recognizable as a chemical ELEMENT. Atoms of different elements may also combine into systems called MOLECULES, which are the smallest units of chemical COMPOUNDS. In all these ordinary processes, atoms may be considered as the ancient Greeks imagined them to be: the ultimate building blocks of matter. When stronger for cesare applied to atoms, however, the atoms may break up into smaller parts. Thus atoms are actually composites and not units, and...
  • B E C The New Phase Of Matter
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    B E C: The New Phase of Matter A new phase of matter has been discovered seventy years after Albert Einstein predicted it's existence. In this new state of matter, atoms do not move around like they would in an ordinary gas condensate. The atoms move in lock step with one another and have identical quantum properties. This will make it easier for physicists to research the mysterious properties of quantum mechanics. It was named 'Molecule of the Year' because it was such a major discovery, but i...
  • Atom Nuclear Force
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    Atoms Atoms are the building blocks of matter. Everything around us is made up of atoms. The atom is more than a million times smaller than the thickness of a human hair. The smallest speck that can be seen under an ordinary microscope contains more than 10 billion atoms. Even though atoms are incredibly tiny, they are made up of even more minute particles: protons, neutrons, and electrons. These are called subatomic particles. Each element has a definite number of subatomic particles, which ma...
  • Atoms Molecular Structure
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    The molecular structure hypothesis - that a molecule is a collection of atoms linked by a network of bonds - was forged in the crucible of nineteenth century experimental chemistry. It has continued to serve as the principal means of ordering and classifying the observations of chemistry. The difficulty with this hypothesis was that it was not related directly to quantum mechanics, the physics which governs the motions of the nuclei and electrons that make up the atoms and the bonds. Indeed ther...
  • Dalton Theory Atoms Particles Air
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    Dalton s Atomic Theory John Dalton developed the first useful atomic theory of matter around 1803. In the course of his studies on meteorology, Dalton concluded that evaporated water exists in air as an independent gas. Solid bodies can't occupy the same space at the same time, but water and air could. If the water and air were made of discrete particles, evaporation might be viewed as a mixing of water particles with air particles. He performed a series of experiments on mixtures of gases to de...
  • Atomic Theory Dalton Atoms Weights
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    John Dalton John Dalton (1766-1844), was a British chemist and physicist, who developed the atomic theory upon which modern physical science is based. Dalton was born on September 6, 1766, in Eagles field, Cumberland County, England. He was the son of a weaver and was initially educated by his father and then at Quaker school in his hometown, where he began teaching at the age of 12. In 1781 he moved to Kendal, where he headed up a school with his cousin and his older brother. He went to Manches...
  • Accomplishments Of John Dalton
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    John Dalton once made this famous quote on his work concerning the atom, We might as well attempt to introduce a new planet into the solar system, or to annihilate one already in existence, as to create or destroy a particle of hydrogen. John Dalton was a British chemist and physicist, who developed the atomic theory upon which modern physical science is founded. Dalton, a Quaker, was born on September 6, 1766, in Eagles field, Cumberland County, England. He received education from the village s...
  • Physics Plan Resistance Of A Wire
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    Physics Plan - Resistance of a Wire Aim The aim of my investigation is to investigate how length affects the resistance of a wire. Theory The four factors that affect the resistance of a wire are: o Length o Material o Temperature o Cross section Resistance is the force, which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. Resistance is measured in ohms. Resistance occurs when the electrons travelling along th...
  • Identify That Metals Have Crystal Lattice Structure
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    web >. The atoms in a crystal are in a regular repeating pattern called the crystal lattice... A crystal lattice is defined by a repeated three-dimensional unit... The basic building block of these crystalline structures is known as the "unit cell" and this "unit cell" repeats itself over and over to form a lattice... When a pure metal starts to form from a cooling molten state, the atoms arrange themselves in an ordered geometrical pattern that is repeated over and over again producing a crysta...
  • Resistance Length Graph Atoms
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    Analysis: With scientific knowledge the graph has turned out like it should have turned out, in that the resistance will increase as the length of a wire increases. This is because of the idea, discussed in the prediction that if you double length, you double the number of atoms in it. As the charges move through the conductor they collide with other atoms. They transfer some of their kinetic energy. This transfer on collision is what causes resistance. So doubling length doubles the amount of ...
  • Structure And Bonding Covalent Bond
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    In my essay on the structure and bonding in different substances, I am going to focus on electronic arrangement and their effects on the properties of the substance. METALIC BONDING Metallic bonding occurs between atoms with low electronegativity (. i. e. 1, 2 or 3 valence electrons); therefore there are many vacancies in valence shell. The crystal lattice of metals consists of ions NOT atoms. When electron clouds overlap, electrons can move into electron cloud of adjoining atoms. The outer ele...
  • Atomic Mass Element Atoms Metals
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    Chapter Three Summary: Atoms and atom's structure Ancient Greek Philosophers suggested that matter was composed of individual particles, which was proved by the theory of John Dalton. The main provisions of his theory are: 1. All matter is composed of tiny, indivisible particles called atoms. 2. All atoms of a particular element are identical but the atoms of one element differ from the atoms of other element. 3. Atoms of different elements combine with each other in certain whole number propor...