PROBLEM 107P

In the beginning of this chapter, you learned that the quantum-mechanical model for the atom is the foundation for modem chemical understanding. Explain why this is so.

Solution 107P

The quantum-mechanical model for the atom is the foundation for modem chemical understanding because it gives information about the followings:

(1)Wave-particle duality

Louis de Broglie proposed that all particles could be treated as matter waves with a wavelength , given by the following equation=

(2)Energy is Quantized

After Max Planck determined that energy is released and absorbed by atoms in certain fixed amounts known as quanta, Albert Einstein took his work a step further, determining that radiant energy is also quantized—he called the discrete energy packets photons. Einstein’s theory was that electromagnetic radiation (light, for example) has characteristics of both a wave and a stream of particles.(3)The Bohr Model of the Atom

In 1913, Niels Bohr used what had recently been discovered about energy to propose his planetary model of the...