Chapter 04 Structure of The Atom Questions-02
Questions
1. On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole.
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Answer
As per Thomson’s model of the atom, an atom consists both negative and positive charges which are equal in number and magnitude. So, they balance each other as a result of which atom as a whole is electrically neutral.
2. On the basis of Rutherford’s model of an atom, which subatomic particle is present in the nucleus of an atom?
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Answer
On the basis of Rutherford’s model of an atom, protons are present in the nucleus of an atom.
3. Draw a sketch of Bohr’s model of an atom with three shells.
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Answer
Bohr’s Model of an atom with three shells
4. What do you think would be the observation if the $\alpha$-particle scattering experiment is carried out using a foil of a metal other than gold?
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Answer
If $\alpha$-particle scattering experiment is carried out using a foil of any metal as thin as gold foil used by Rutherford, there would be no change in observations. But since other metals are not so malleable so, such a thin foil is difficult to obtain. If we use a thick foil, then more $\alpha$-particles would bounce back and no idea about the location of positive mass in the atom would be available with such a certainty.
