Because of its chemical similarity to calcium, 90/38 Sr can collect in the bones and present a health risk. Part A
What percentage of 90/38 Sr present initially still exists after a period of 46.0y ?
Part B
What percentage of 90/38 Sr present initially still exists after a period of 59.0y ?
Part C
What percentage of 90/38 Sr present initially still exists after a period of 70.0y ?

no sign of dia of fuel cell

its c i just checked it

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.