You place a ton of radioactive material into a lead box and close the box. What radioactive decay particle(s) will escape the box?

Beta particles and neutrons

Explanation:

Lead is not particular good for shielding beta particles and neutrons. Lead shielding is used for shielding x-rays and gamma-rays due to its high density and atomic mass.

Materials made with lead are used by people dealing with all kinds of radioactive particles to prevent radioactive poisonings.

But lead cannot effectively protect against beta particles and neutrons.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.