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Physics, Chemistry, Technology

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Latest Blog Posts for Science Education

  • Ionization potential Energy
    on Jun 7, 2010 in properties of p.t
    Ionization potential Energy:It is the energy needed to remove one or more electrons from a neutral atom to form a positively charged ion.A multi-electron atom would have many ionization energiesSo by definition:1st ionization potential: it is the ene...
  • Trends in atomic radius in the Periodic Table
    on Jun 6, 2010 in properties of p.t chemistry
    Trends in atomic radius in Periodic table:We have to ignore the noble gas at the end of each period because neon and argon don't form bonds.In horizontal period: Atomic radius decreases from left to right due to:Gradual increasing in positively nucle...
  • Sound - Multiple Choice Test
    on Jun 2, 2010 in physics
    Question 1Question: When a wave travels through a medium ______.1. particles are transferred from one place to another2. energy is transferred in a periodic manner3. energy is transferred at a constant speed4. none of the above statements is applic...
  • Periodic Properties of the Elements (ATOMIC AND IONIC RADIUS)
    on Jun 1, 2010 in chemistry
    Measures of atomic radius: Unlike a ball, an atom doesn't have a fixed radius. Why? Because it is impossible to determine exactly the location of an electron around the nucleus, so atomic radius can't be measuredAgain: Why it is impossible to determ...
  • Man infects himself with computer virus
    on Jun 1, 2010 in top tec
    University of Reading researcher Mark Gasson has become the first human known to be infected by a computer virus. The virus, infecting a chip implanted in Gasson's hand, passed into a laboratory computer. From there, the infection could have spread i...
  • Principles of distributing electrons
    on May 29, 2010 in chemistry
    Principles of distributing electrons:Auf-beau principle: electrons occupy the sublevels of lower energy first then of higher oneThis diagram predicts the following order of increasing energy for atomic orbitals1s < 2s < 2p < 3s < 3p <...
  • Aerogel materials AND (Aerogel Capture Medium)
    on May 29, 2010 in top tec chemistry
    Silica Aerogels:With the primary mission of Stardust being to capture dust particles from Wild 2, the Aerogel capture material is one of the most important parts of the craft. Travelling at up to 12.8km/s, the particles possess huge kinetic energy. T...
  • Quantum Numbers
    on May 28, 2010 in chemistry
    Quantum Numbers: They define:The volume of space (orbital) where there is maximum probability of finding the electrons.The energy of each orbitalThe shape of each orbitalThe direction of each orbitalPrincipal quantum number (n): Used by Bohr in expla...
  • Modern atomic theory
    on May 28, 2010 in chemistry
    Modern atomic theory:Based on:(Wave-Particle Dualism) the dual nature of the electronHeisenberg Uncertainty PrincipleFinding the mathematical expression that describes:Wave motion of electronShape and energy of that wave motionThe dual nature of the...
  • The dual nature of the electron
    on May 28, 2010 in chemistry physics
    Wave-Particle Duality/The Two-Slit Experiment/Electrons:According to classical physics, electrons should behave like particles - the travel in straight lines and do not curve in flight unless acted on by an external agent, like a magnetic field. In t...
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