photoelectric effect

De Broglie theory (Duality)

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The photoelectric effect showed that light consists of streams of particles called photons. This leads to the conclusion that like matter, light radiation can sometimes behave as particles. The phenomenon of interference, diffraction and polarization of the light indicate that light is wave. Light therefore, exhibits dual nature. It behaves like particle as well as … Read more

Trends in atomic and physical properties of alkali metals

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A) The electronic configuration(EC) The EC of alkali metal is ns1. They have single electron in their outer most shell. Therefore, their valency is also one. They have a great tendency of losing electron from their outermost orbit. Due to the above reason, they are considered to be the most electropositive elements. For example: Na … Read more