Question

The basis of quantum mechanical model of atom is:
A.Angular momentum of electron
B.Quantum numbers
C.Dual nature of electron
D.Black body radiation

Answer 1

Hint: Quantum mechanical model of the atom uses complex shapes of orbitals, volumes of space in which there is likely to be an electron. It states that an electron is not only a particle but has a wave character.

Complete step by step answer:
-In 1905, Einstein suggested the concept of light having a dual nature: particle and wave nature. In a similar way, Louis de Broglie suggested that electrons also exhibit a dual nature.
Further, Bohr considered only the particle nature of electrons and hence contradicted Broglie’s concept.
-The de Broglie’s equation was applicable to all the material objects but its significance was only in the case of microscopic particles.
-Since, we came across macroscopic particles, de-Broglie’s relationship has no significance in everyday life.
-Further in 1926 Erwin Schrodinger, took the Bohr atom model one step further. He used mathematical equations to describe the likelihood of finding an electron in a certain position.
-This atomic model is known as the quantum mechanical model of the atom.
Thus,
- This model is based upon the dual nature of the electron, i.e. the electron is not only a particle but has a wave character.The wave character of an electron has particle significance since its wavelength is easily observed in the electromagnetic spectrum.

Hence, option C is correct.

Note:
The quantum mechanical model of an atom helps in explaining the behavior of electrons. The electron of an atom is responsible for the chemical and physical properties of the atom, therefore this model is important for understanding chemistry.