• The Development Of The Atomic Theory
    1,469 words
    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...
  • 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...
  • Atomic Theory Electrons Particles Atoms
    715 words
    Chemistry: A Brief History of Atomic Theory February 28, 1999 In the beginning of the 1800 s John Dalton, an English scientist did work some work on gases, which lead him to the creation of a complex system of symbols for all known elements at the time. He took all the information he had collected, along with the Laws of Conservation of Mass, Definite Composition and Multiple Proportions and updated Aristotle's theory of matter with the Atomic Theory of Matter, which stated: - All matter is comp...
  • Quantum Theory 1800 Living Theories
    980 words
    Scientific development in the 1800 s In the 1800 s there were mainly five main areas of scientific development: knowledge about the atom, the quantum theory and Einstein's theories, knowledge about the cell, theories of evolution, genetics and medicine. In 1803 John Dalton was the first person to get experimental evidence of the atom's existence. He also developed a method for weighing atoms. In 1869 Dmitri Mendeleev made the first workable classification of the atoms, the precedent of the moder...
  • 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...
  • A Brief History Of Atomic Theory
    713 words
    In the beginning of the 1800 s John Dalton, an English scientist did work some work on gases, which lead him to the creation of a complex system of symbols for all known elements at the time. He took all the information he had collected, along with the Laws of Conservation of Mass, Definite Composition and Multiple Proportions and updated Aristotle? s theory of matter with the Atomic Theory of Matter, which stated: – All matter is composed of tiny, indivisible particles called atoms. ̵...
  • A Brief History Of Atomic Theory
    915 words
    In the beginning of the 1800 s John Dalton, an English scientist did work some work on gases, which lead him to the creation of a complex system of symbols for all known elements at the time. He took all the information he had collected, along with the Laws of Conservation of Mass, Definite Composition and Multiple Proportions and updated Aristotle? s theory of matter with the Atomic Theory of Matter, which stated: – All matter is composed of tiny, indivisible particles called atoms. ̵...