How may `alpha-` and `beta-` particles will be emitted when `._(90)Th^(232)` changes into `._(82)Pb^(208)`?

How may `alpha-` and `beta-` particles will be emitted when `._(90)Th^

1.	How may `alpha-` and `beta-` particles will be emitted when `._(90)Th^(232)` changes into `._(82)Pb^(208)`?
Answer» Suppose `._(90)Th^(232) rarr ._(82)Pb^(208) + m_(2)^(4) He + n_(-1)^(0)e` Equating mass numbers: `232 = 208 + 4m` or `m = 6` Equating atomic numbers: `90 = 82 + 12 + (-n)` or `n = 4` Thus, `6alpha` and `4beta^(-)` particles will be emitted.

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How may `alpha-` and `beta-` particles will be emitted when `._(90)Th^(232)` changes into `._(82)Pb^(208)`?

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