Cells have lots of things to do. Some cells make the whole organism, so that one cell must do everything that organism needs to do to live. Other cells perform specific functions, so they must be designed to do that specific activity.
There you go :) just reword it and try make it into your own words like just switch some sentences around
The number of protons is always equal to the atomic number of any element. strontium has 38 protons, which when taken away from 90 gives you 52 neutrons, which is three more neutrons than what Sr should have making 38 90Sr an isotope. Hope this helps.
7.5 is less accurate then 7.50 because you are getting a less exact measurement.
A. Reactants, products
In a chemical reaction, reactants interact to form products
