1) a sample containing 10kg of carbon-15
with half life period of 2.449sec. Calculate
i.
It
mass after 20 minutes..
ii.
how
long will it take to be 2g.
iii.
time
for it to be 100g.
1) a sample containing 20kg of beryllium-14
decays by half after 9.68sec. Calculate
i.
its
half life.
ii.
its
mass after 20 minutes.
iii.
time
at which it reduces to 200grams.
2) a given sample seoborgium-266 with half life period of 30 sec. reduces to
10kg after one hour . calculate
i.
its
original mass.
ii.
time
to reduce to 300g.
iii.
its
mass after 2 hours.
3) 10g of oxygen-15 reduces to 5g after
122.24sec. calculate;
i.
its
mass after 60 minutes.
ii.
time
when its 1g.
iii.
its
decay constant.
4) phosphorous-32 decays into half of
its initial mass after 14.29days.
i.
calculate
it mass after a year.
ii.
its
decay constant.
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