radioactivity

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462206
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60
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the nucleus of a uranium isotope contains 143 neutrons and 92 protons. what is the atomic number?

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462207
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60
none
462208
0
180
none
462209
0
60
none
462210
0
60
none
462211
0
60
none
462212
0
60
none
462213
0
60
none
462214
0
60
none
462215
0
60
none
462216
0
120
none
462217
0
60
none
462219
0
60
none
462220
0
60
none
462221
0
60
none