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.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.