Qstnid -A-27- An Atomic Nucleus A Is Composed Of 84 Protons And 128 Neutrons. It Emits An Α-particle And Is Transformed Into Nucleus B. Write Down The Composition Of B. - 12: Radioactivity - Icse-x-physics

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ICSE-X-Physics

12: Radioactivity

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#27
An atomic nucleus A is composed of 84 protons and 128 neutrons. It emits an α-particle and is transformed into nucleus B. Write down the composition of B.
Ans : 27 A emits an α-particle, so in the nucleus of B, neutrons will be 128 - 2 = 126 and protons will be 84 - 2 = 82.