studmuffin32 studmuffin32

20-01-2017
Biology

contestada

Radium has a half-life of 1,620 years. In how many years will a 1 kg sample of radium decay and reduce to 0.125 kg of radium?

3,240 years

6,480 years

4,860 years

1,620 years

Respuesta :

Kurohanico Kurohanico

20-01-2017

4680 years

1 x .5 = .5

.5 x .5 = .25

.25 x .5 = .125

You multiplied 3 times, so 3 times 1,620 is 4,680.

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