Atomic Structure 1 Question 17
17. When alpha particles are sent through a thin metal foil, most of them go straight through the foil, because
(1984, 1M)
(a) alpha particles are much heavier than electrons
(b) alpha particles are positively charged
(c) most part of the atom is empty space
(d) alpha particles move with high velocity
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Answer:
Correct Answer: 17. $(\mathrm{a}, \mathrm{c})$
Solution:
- Alpha particles passes mostly undeflected when sent through thin metal foil mainly, because
(i) it is much heavier than electrons.
(ii) most part of atom is empty space.
