3.
The half-life of 42K is 12.4 hours. How much of a 750 g sample is left after 62.0 hours?

I’m guessing you’re more alert to yourself or your surroundings if you’re more concentrated

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.