5 Questions MCQ Test Science Class 9 - Test: Rutherford's Model of an Atom
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What did Rutherford conclude from his gold foil experiment?
Detailed Solution for Test: Rutherford's Model of an Atom - Question 1
According to his experiment, Rutherford conclusion given below,
Rutherford's first conclusion is that the nucleus is smaller than the atom and second is that inside the atom electrons and nucleus are present. In the atom electrons revolve around the nucleus and rotate itself. The mass of the atom depends on the nucleus. The nucleus only has the maximum mass of the atom. The charge of the nucleus is positive and the charge of electrons is negative.
Which of the following is not a part of the observations made by Rutherford in his experiment?
Detailed Solution for Test: Rutherford's Model of an Atom - Question 2
Only a few particles bounced back because the nucleus is so small / atom is mostly empty space that few collided with a nucleus . If they bounced back it was because of alpha particle and nucleus are positive : repulsion if they bounced back it was because nucleus is massive / dense so alpha particles rebound . "
Which one of the following statements is true according to Rutherford’s nuclear model of an atom?
Detailed Solution for Test: Rutherford's Model of an Atom - Question 4
Correct Option is D.
Rutherford Model of an atom:
On the basis of Rutherford's experiment,
(1) An atom consist of positively charged, dense and very small nucleus containing protons and neutrons. The entire mass of an atom is concentrated in the nucleus.
(2) The nucleus is surrounded by negatively charged electrons. The electrons are revolving around the nucleus in circular paths at very high speed. These circular paths of the electrons are called orbits.
(3) An atom is electrically neutral because the number of protons and electrons is equal.
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