The half-life of radioactive Atoms Refers to A. The time required for half the Atoms in a sample to the decay.

B. The number of atoms in a sample that are radioactive.

C. Half the time required for all the Atoms in a sample to disintegrate.

D. The number of atoms that decay in half a second.

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The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

Why is the melting of ice a physical change ?

What methods could you use to solubilize calcium carbonate