Please show work! A nucleus contains 60 protons and 70 neutrons. An alpha partic

Question

Please show work!

A nucleus contains 60 protons and 70 neutrons. An alpha particle is fired at, and is absorbed by, the nucleus, creating a nucleus of a new element, which is unstable. The resulting nucleus then emits a photon and a negative beta particle, then an alpha particle, and finally, one more particle, which is unknown. The nucleus that results is then stable; it contains 60 protons and 70 neutrons. What is the unknown particle? beta particle positron neutron alpha particle none of these

Explanation / Answer

a) beta particle

This beta particle must be a positive beta particle.

60 protons + 70 neutrons + 1 alfa particle -----> new element ----> 60 protons + 70 neutrons + 1 alfa particle + 1 beta- particle + 1 beta+ particle

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