Differentiate between the following.
Discoveries of J.J. Thomson, Ernest Rutherford, and Neils Bohr.

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Solution

Discoveries of J.J.Thomson, Ernest Rutherford Neils Bohr
A. This model states the electron are embedded in a positively charged solid material which is spherical in shape. A. This model explains that there is a nucleus in the center of the atom and electrons are located around the nucleus. A. This was proposed by Bohr in 1922.
B. Thomson model of an atom does not give any information about the nucleus B. This model gives information about the nucleus and its location inside the atom. B. Electrons only emit a wave of definite frequencies.
C. According to this electrons are embedded in a solid material. C. This model says electrons are located around the nucleus. C. Most of the atomic mass lies in the centre of nucleus which contains protons, and electrons are arranged in definite energy level.
D. This model does not give information about the orbitals. D.T his model explains about the orbitals and electrons located in these orbitals D. It gives satisfactory explanation about the concept of orbitals.
E. According to this model mass of an atom is the mass of positively charged solid where electrons are embedded. E. According to this model the mass of an atom is concentrated in the nucleus of an atom. E. According to this nucleus contains the majority of the mass of the atom in its protons and neutrons.

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Discoveries of J.J.Thomson,	Ernest Rutherford	Neils Bohr
A. This model states the electron are embedded in a positively charged solid material which is spherical in shape.	A. This model explains that there is a nucleus in the center of the atom and electrons are located around the nucleus.	A. This was proposed by Bohr in 1922.
B. Thomson model of an atom does not give any information about the nucleus	B. This model gives information about the nucleus and its location inside the atom.	B. Electrons only emit a wave of definite frequencies.
C. According to this electrons are embedded in a solid material.	C. This model says electrons are located around the nucleus.	C. Most of the atomic mass lies in the centre of nucleus which contains protons, and electrons are arranged in definite energy level.
D. This model does not give information about the orbitals.	D.T his model explains about the orbitals and electrons located in these orbitals	D. It gives satisfactory explanation about the concept of orbitals.
E. According to this model mass of an atom is the mass of positively charged solid where electrons are embedded.	E. According to this model the mass of an atom is concentrated in the nucleus of an atom.	E. According to this nucleus contains the majority of the mass of the atom in its protons and neutrons.