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Th^(234) disintegrates and emits 6beta- ...

`Th^(234)` disintegrates and emits `6beta-` and `7alpha-` particles to form a stable product. Find the atomic number and mass number of the stable product and also identify the element.

Text Solution

Verified by Experts

Nuclear reaction is `:`
`._(90)Th^(234)rarr7._(2)He^(4)+6._(-1)e^(0)+._(Z)X^(A)`
Equating atomic number on both sides
`90=14+6xx(-1)+Z`
`:. Z=82`
Equaing mass number on both sides
`=234=7xx4+6xx0+A` ,br. `:. A=206`
Thus, element with atomic number 82 and mass number 206 is `._(82)Pb^(206)`
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