Verified Answer :

A Beta particles is emitted when an atom of 85Kr spontaneously decays.

Answer:

The correct answer is 2= a beta particle.

Explanation:

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When an atom of 85Kr decomposes spontaneously, a beta particle is emitted. This is an electron that is emitted, so the atom now has more positive charge. The atomic mass does not vary.

The correct answer is 2= a beta particle.

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