• Bohr And The Periodic Table
    473 words
    Bohr's Model There are three main parts of an atom the electrons, protons and the neutrons. Each part has charge. It is rather positive, negative, or neutral. An electron always has a negative charge. Protons always have negative charges. Then finally the neutron is a neutral charge or a charge of zero. If the charge of the whole atom it zero that means there are an equal number of positive and negative pieces. An electron can be found anywhere around the nucleus, and the protons and neutrons a...
  • 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 ...
  • Atom Book Protons Neutrons Helium
    282 words
    Atom Book Hey kids! Today I'm going to introduce you to the world of atoms. Atoms are little things that you or anybody else have ever seen. Make up things like trees, cars, paper, even you. So let's shrink down to size and see what it's like. We " re going to into the Helium atom today. An atom is made of little things called protons, , and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Electrons travel around the center of the atom, w...
  • Hydrogen Energy Atom Levels
    371 words
    Wild Bill's Wild Bohr Quiz Niels Bohr's model of the hydrogen atom, was the primary reason for the understanding of energy levels. Bohr was able to explain the bright line spectrum of hydrogen. Sparked by the recent discovery of the diffraction patterns, scientists believed electrons could be described as waves. Bohr hypothesized that energy is being added to the hydrogen gas in the electricity form, and then leaving the gas in the form of light. He figured the light rays to be quantized, meanin...
  • Hydrogen Bomb Process Atom Neutrons
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    The Hydrogen Bomb The history and workings of this massive bomb Back in 1905 Albert Einstein published his special theory of relativity. According to this theory the relation between mass and energy is expressed by the equation E = mc squared, which states that a given mass (m) is associated with an amount of energy (E) equal to this mass multiplied by the square of the speed of light (Encarta). So years later in 1939 two German chemists took this idea and applied it to a uranium atom, which wou...
  • Alpha Particle Rutherford Atom Decay
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    Ernest Rutherford in his Laboratory at McGill University ca. 1903. Ernest Rutherford (1871-1937) Ernest Rutherford is considered the father of nuclear physics. Indeed, it could be said that Rutherford invented the very language to describe the theoretical concepts of the atom and the phenomenon of radioactivity. Particles named and characterized by him include the alpha particle, beta particle and proton. Even the neutron, discovered by James Chadwick, owes its name to Rutherford. The exponenti...
  • Atom And Qi Modern Physicists
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    Atom & Qi The atom is the smallest portion of a substance that is not perceivable by human senses. The notion of atoms was conceived by ancient Greeks and was developed over thousands of years of scientific inquiry. The concept of qi as the most basic substance of which the world (everything) is comprised, was understood by the ancient Chinese. Both! yen atom! | and! yen qi! | are believed to exist by human beings and both are considered to be unseen objects (until we could see atoms recently). ...
  • 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...
  • Phases Of Matter Liquid Change Solid
    620 words
    SCIENCE Solution-type of mixture formed when I substance dissolves in another Energy-The 'colder' the phase, tends to have less energy Freezing Point-Temperature where liquid turns to solid Atomic Number-Number of protons in the nucleus of an atom Matter-Has mass and takes up space 4 phases of matter-solid, liquid, gas, plasma Mixture-Matter that consists of 2 or more substances mixed together but NOT chemically combined ex: salt, sugar Atom-Smallest particle of an element that has the propertie...
  • Historical Development Of Atomic Structure
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    Historical Development of Atomic StructureYazan FahmawiSept. 30, 1995 T 3 IBS Chemistry Ms. Redman The idea behind the 'atom' goes back to the Ancient Greek society, where scientists believed that all matter was made of smaller, more fundamental particles called elements. They called these particles atoms, meaning 'not divisible.' Then came the chemists and physicists of the 16 th and 17 th centuries who discovered various formulae of various salts and water, hence discovering the idea of a mole...
  • Chemical Basis Of Life
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    Chapter 4 The Chemical Basis of Life Introduction o Your body is an elaborate chemical system. o Chemical signals between brain less enable your mind to understand what you see. o You nourish those cells with chemicals that are obtained from food. o Life is all about chemicals and how they interact Concept 4. 1 Life requires about 25 chemical elementsElementso Humans and other organisms are examples of matter. Matter: Anything that occupies space and has mass. (Physical things) o The various fo...
  • Atom Nuclear Force
    559 words
    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...
  • Bohr At The Rutherford Lab
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    Bohr at the Rutherford Lab Everyone at the time imagined the atom as a "plum pudding." That is, it was roughly the same thing throughout, with negatively charged electrons scattered about in it like raisins in a pudding. As part of an experiment with x-rays in 1909, Rutherford was shooting a beam of alpha particles at a sheet of gold foil only 1/3000 of an inch thick, and tracing the particles' paths. Most of the particles went right through the foil, which would be expected if the atoms in the ...
  • Atomic Theory Atom Electrons Thompson
    1,223 words
    In ancient Greek the word atom meant the smallest indivisible particle that could be conceived. The atom was thought of as indestructible; in fact, the Greek word for atom means "not divisible." Knowledge about the size and make up of the atom grew very slowly as scientific theory progressed. What we know / theorize about the atom now began with a core theory devised by Democritus, a Greek philosopher who proposed that matter consisted of various types of tiny discrete particles and that the pro...
  • Bonds Are Formed Atom Atoms Covalent
    1,266 words
    1. 1 Dalton's Theory - "billiard atom" - Matter is made up of small dense particles called atoms. - Atoms are each element are identical. - Atoms are indestructible. Problems which arose: Because Dalton did not believe that elements could be diatomic, his theory could not explain Gay Lus sacs Law of combining volumes. A Avogadro had solved the problem of correctly determining atomic weights as early as 1811. He also realised that ultimate particles of gases could be diatomic and was the first c...
  • Charged Particle Atom Particles Mass
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    It has been said that during the 20 th century, man harnessed the "power of the atom." We made atomic bombs and generated electricity by nuclear power. We even split the atom into smaller pieces called subatomic particles. But what exactly is an atom? What is it made of? What does it look like? The pursuit of the structure of the atom has married many areas of chemistry and physics in perhaps one of the greatest contributions of modern science! . The parts of the atom: . chemistry and electromag...
  • Electrons Protons Neutrons Number
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    33. Elements differ according to the number of protons their atoms contain, a value called the element's atomic number. All atoms of a given element have the same number of protons and an equal number of electrons. The number of neutrons in an atom is not predictable but is generally as great or greater than the number of protons. The total number of protons plus neutrons in an atom is called the atom's mass number. 40. Protons, electrons, and neutrons. Protons, neutrons (1 amu) and electro...
  • Atomic Theory In Ancient
    1,222 words
    In ancient Greek the word atom meant the smallest indivisible particle that could be conceived. The atom was thought of as indestructible; in fact, the Greek word for atom means "not divisible.' Knowledge about the size and make up of the atom grew very slowly as scientific theory progressed. What we know / theorize about the atom now began with a core theory devised by Democritus, a Greek philosopher who proposed that matter consisted of various types of tiny discrete particles and that the pro...
  • Niels Bohr October 21
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    October 21, 1998 Niels Bohr Niels Bohr was born in Copenhagen, he is the son of a physiology professor, and went to school at the University of Copenhagen, this is where he got his doctorate in 1911. Bohr won the Nobel piece prize for his theory of atomic structures. According to Microsoft Encarta His work drew on Rutherford? s nuclear model of the atom, in which the atom is seen as a compact nucleus surrounded by a swarm of much lighter electrons. He thought that electrons are arranged in defin...
  • Cathode Rays Thomson Charge Atom
    1,384 words
    Joseph John Thomson was born on December 18, 1856 near Manchester, England. His father died when "J. J. .' was only sixteen. The young Thomson attended Owens College in Manchester, where his professor of mathematics encouraged him to apply for a scholarship at Trinity College, one of the most prestigious of the colleges at Cambridge University. Thomson won the scholarship, and in 1880 finished second in his class in the grueling graduation examination in mathematics. Trinity gave him a fellowsh...