1.

How many alpha particles are emitted per second by 1 microgram of radium

Answer»

`3.62 xx 10^(4)//s`
`0.362 xx 10^(4)//s`
`362 xx 10^(4)//s`
`36.2 xx 10^(4)//s`

Solution :`1 C_(i) =` Activity of 1 g of `Ra^(226) = 3.7 xx 10^(10)` days
Activity of `1 mug" of " Ra^(226) = 3.7 xx 10^(14)` dps
So, the no. of `alpha` - particles EMITTED per second by `1 mu g` of Ra is `3.7 xx 10^(4) dps ~~ 3.62 xx 10^(4)//s`


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