Which of the following is incorrect for ...

Which of the following is incorrect for Thomson's model of the atom?

The stability of the atom was due to the balance between the repulsive forces between the electrons and their attraction towards the cnetre of the positive sphere.

In Thomson's model, the positive charge of the atom was so diffuse that the positive `alpha` particles were expected to pass through without and deflection or with very little deflection.

Thomson's model could be visualized as a watermelon of positive charge with seeds (electrons) embedded into it.

Mass of the atom is considered to be unevenly spread over the atom.

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The correct Answer is:

Like the positive charge, mass is also spread out.

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Quantum mechancial model of atom is the picture of the structure of the atom which emerges from the application of the Schrddot(o)dinger equation to atoms. Which of the following is the incorrect feature of the euantum mechanical model of atom?

The energy of free electrons is quantized.

The existance of quantized enegry levels is the direct result of the wave-like properties of electron and are allowed solutions of the Schrddot(o)dinger wave equation.

We talk of only the proabability of finding the electron at different points in an atom as the path of an electron in an atom can never be determined or known accurately in accordance with Heisenberg's uncertainty principle.

To distinguish the quantum mechanical description form Bohr's model, we speak of an atomic orbital or just orbital, rather than an orbit. An orbital can be though of as the wave function `(psi)` of an electron in an atom.

Which of the following is incorrect according to Dalton's atomic theory ?

Matter is made up of atoms

Atoms of same element are different in mass and properties

Atoms combine in a simple whole number ratio

Atoms take part in a chemical combination

Which of the following statement is correct in case of Thomson's atom model?

It explains the phenomenon of thermionic emission, photoelectric emission and ionisation

It could not explain emission of line spectra by elements

It could not explain scattering of `alpha`-particles

all of these