Because you need to know how/ learn to try new things for (new experiments) and creativity will teach you different ways on how to do it.
Magnesium has 22 electrons and 24 protons
12.5% of strontium-90 would remain in a sample after three half-lives have passed. Half-life automatically means 50% of the original amount would remain.
Answer:
I believe physical
Explanation:
If you step on the bag of chips, it would reduce them to crumbs. Wouldn't this be a physical change in the chips?
