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Properties of Alpha, Beta and Gamma Radiations

The entire po...

Question

The entire positive charge of the atom is located in the nucleus while the electrons are distributed in the vacant space around it. This statement was given by Thomson.

A

True

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B

False

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Solution

The correct option is B False
$F a l s e$
Rutherford's atomic model states that the entire positive charge of the atom is located in the nucleus, while the electrons are distributed in the vacant space around it. This statement was given by Rutherford, not by Thomson.

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According to Thomson, positive charges were 183 times greater than electrons in magnitude; hence the atom as a whole was positively charged.

Q. In Thomson's model of the atom, which of the following statements are correct?
(i) The mass of the atom is assumed to be uniformly distributed over the atom.
(ii) The positive charge is assumed to be uniformly distributed over the atom.
(iii) The electrons are uniformly distributed in the positively charged sphere.
(iv) The electrons attract each other to stabilize the atom.

During Rutherford's α-particle scattering experiment, he concluded that:

(i) electrons have a negative charge.
(ii) the mass and positive charge of the atom is concentrated in the nucleus.
(iii) neutron exists in the nucleus.
(iv) most of the space in an atom is empty.

Q. Following conclusions were drawn from the given figure :
I. There is a positively charged centre in an atom called the nucleus.
II. An atom consists of a positively charged sphere and the electrons are embedded in it.
III. The electrons revolve around the nucleus in well-defined orbits.
IV. The size of the nucleus is very small as compared to the size of the atom
V. Only certain special orbits known as discrete of electrons are allowed inside the atom.
Choose the correct statements.

Q. In Bohr’s model of an atom, negatively charged electrons travel around the positively charged nucleus in the orbital paths, similar to the path of the planets around the sun.

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