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Alan Gonzalez

Chemistry - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Chemistry

chemistry

shared by Alan Gonzalez on 22 Jun 14 - No Cached
  • Chemistry
  • Chemistry, a branch of physical science, is the study of the composition, structure, properties and change of matter.
  • Chemistry is chiefly concerned with atoms and their interactions with other atoms - for example, the properties of the chemical bonds formed between atoms to create chemical compounds.
  • ...9 more annotations...
  • Chemistry is sometimes called "the central science" because it bridges other natural sciences like physics, geology and biology with each other.
  • Chemistry is a branch of physical science but distinct from physics.
  • Etymology
  • The word chemistry comes from the word alchemy, an earlier set of practices that encompassed elements of chemistry, metallurgy, philosophy, astrology, astronomy, mysticism and medicine; it is commonly thought of as the quest to turn lead or another common starting material into gold.
  • Alchemy, which was practiced around 330, is the study of the composition of waters, movement, growth, embodying, disembodying, drawing the spirits from bodies and bonding the spirits within bodies
  • An alchemist was called a 'chemist' in popular speech, and later the suffix "-ry" was added to this to describe the art of the chemist as "chemistry".
  • The word alchemy in turn is derived from the Arabic word al-kīmīā (الکیمیاء). In origin, the term is borrowed from the Greek χημία or χημεία.
  • This may have Egyptian origins.
  • Many believe that al-kīmīā is derived from the Greek χημία, which is in turn derived from the word Chemi or Kimi, which is the ancient name of Egypt in Egyptian.
Sergio Perez

SFT_preprint-EN_2_col.pdf - 0 views

Unified field theory Quantum gravity vacuum Strong nuclear force Dark matter energy

shared by Sergio Perez on 29 Jan 24 - No Cached
  • Sergio Perez on 29 Jan 24
     
    Unification theory with no extra dimensions. The first part unifies the strong nuclear force with the gravitational force in a mathematical way; the quantum vacuum is treated as a deformable system by the strong nuclear force. The second part unifies the nuclear force with the quantum vacuum in a hypothetical structure; the quantum vacuum is treated as a supersymmetric and metastable system with properties related to the different types of particles' motion.
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