Radon-222 has 136 neutrons, how many neutrons are there in Radon-220?
Correct answer: B. 134
- A. 131
- B. 134
- C. 136
- D. None of these
Explanation
Option B is correct since both Radon 220 and Radon 222 will have the same number of protons. If Radon 222 has 136 neutrons, Radon 220 will have 134 neutrons.Option A is incorrect since it indicates that 3 neutrons are less in between Radon 220 and Radon 222.Option C is incorrect since it indicates that both Radon 222 and Radon 220 have the same number of neutrons which cannot happen with the same element (same number of protons). It must have different mass numbers for it to be the same element.Option D is incorrect since it states none of these which is not the case.
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