1.

If ._(92)U^(236) nucleus emits one alpha-particles, the remaining nucleus will have

Answer»

119 neutrons and 119 protons
142 neutrons and 90 protons
144 neutrons and 92 protons
146 neutrons and 90 protons

Solution :`._(92)U^(236) rarr ._(90)X^(232) + ._(2)He^(4)`
`._(90)X^(232)` have 90 protons and 142 neutrons


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