1.

If uranium (mass number 238 and atomic number 92) emits an alpha- particle, the product has mass no. and atomic no.

Answer»

236 and 92
234 and 90
238 and 90
236 and 90

Solution :`.^(92)U^(238) RARR ._(90)U^(234) + ._(2)^(4)He`


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