The half-life of I is 0.220 years. How much of a 500.0 mg sample remains after 24 hours?

How is the composition of a meteorite relevant to finding out the composition of earth's core?

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

What element breaks down into yttrium-90?