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  • The Atom

    1574 Words  | 7 Pages

    The Atom      In the spring of 1897 J.J. Thomson demonstrated that the beam of glowing matter in a cathode-ray tube was not made of light waves, as "the almost unanimous opinion of German physicists" held. Rather, cathode rays were negatively charged particles boiling off the negative cathode and attracted to the positive anode. These particles could be deflected by an electric field and bent into curved paths by a magnetic field. They were much lighter

  • Atom

    555 Words  | 3 Pages

    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

  • Atoms

    653 Words  | 3 Pages

    study in quantum mechanics. The present approach is designed to meet this need by stressing the physical or observable aspects of the theory through an extensive use of the electronic charge density. The manner in which the negative charge of an atom or a molecule is arranged in three-dimensional space is determined by the electronic charge density distribution. Thus, it determines directly the sizes and shapes of molecules, their electrical moments and, indeed, all of their chemical and physical

  • The Atom

    3845 Words  | 16 Pages

    The Atom 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 forces are applied to atoms, however, the atoms may break up into smaller parts. Thus atoms are actually composites

  • The Model of the Atom

    1113 Words  | 5 Pages

    something in that topic that drew my attention, the model of the Atom. Ever since the fifth century, the understanding of the atom has evolved. The Greeks invented the idea of the atom, and they believed that it wasn’t physically divisible. Then, John Dalton revised the theory and proposed a new model of the atom stating that the electrons and nucleus were indefinite. In 1897, J.J Thomson came up with a new theory stating that atoms were made out of even smaller particles and that negative charged

  • Atoms and Radioactivity

    739 Words  | 3 Pages

    Science Essay “How can our understanding of the atom help us make choices on its use in our world?” Atoms are everywhere and we use them in everyday life. They are the building blocks of all matter. There are 3 different type of ionizing radiation. Alpha, Beta and Gamma. An Alpha particle consists of 2 protons and 2 neutrons bound together into a particle identical to a helium nucleus. This is the least powerful radioactive particle. Alpha particles cannot penetrate the human body at all. They do

  • Atoms of the Future

    2344 Words  | 10 Pages

    Atoms of the Future One of the most overlooked issues in the world today is that of our rapidly decreasing sources of energy. The majority of the world’s energy comes from fossil fuels; coal, oil, and natural gas are burned in order to generate our electricity. But many people, both politicians and common people alike, fail to realize fossil fuels are not renewable, and are being depleted rapidly. Furthermore, the burning of fossil fuels does immense damage to our environment. Burnt fossil

  • Atom And Qi

    2080 Words  | 9 Pages

    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 ¡¥atom¡¦ and ¡¥qi¡¦ are believed to exist by human beings and both are considered to be unseen objects (until we could see atoms recently). However

  • Importance Of Atom

    559 Words  | 3 Pages

    Never Trust an Atom, They Make up Everything Atoms are everywhere. They make up the chair sat you are on, the paper you are reading, even the pen used to grade this paper. Atoms are the smallest part of a substance known to man. The atom is made up of a total of three particles: the proton, neutron, and electron. The protons and neutrons make up the nucleus, while the electrons fly around the nucleus in a cloud. Electrons are negative and protons are positive. In a neutral atom, there is the same

  • The Structure of the Atom

    2154 Words  | 9 Pages

    The Structure of the Atom [IMAGE] Basic Atomic Particles : Atoms are made up of the following particles : Protons : Protons are positively charged particles with a mass of one atomic mass unit. They are found in the nucleus at the centre of the atom structure. Neutrons : Neutrons are not charged and have a mass of one atomic mass unit. They are found, with protons at the centre of the atom. Electrons : Electrons are negatively charged particles with