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What is the ratio of the number of neutrons to the number of protons in 92U238?

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92 : 238

238 : 92

146 : 92

92 : 146

answer is C.

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Detailed Solution

The ratio of the number of neutrons to the number of protons in 92U238 is

146 : 92

.
The nucleus of atoms contains protons and neutrons combined together. The atomic number of

_{92} U^{238}

92

, which means the number of protons in the nucleus is

92

. The mass number is

238

, which is the sum of the number of neutrons and protons. Thus, the number of neutrons is

238 - 92 = 146

. Therefore, the ratio of the number of neutrons to the number of protons is

146 : 92

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