4. Make a rule: Based on your data, how are elements arranged into chemical families? 5. Infer: Look at your periodic table. How many valence electrons would you find for elements
in each family?
Boron family:
Carbon family:
Neon family:
6. Think and discuss: How do you think the number of valence electrons relates to an
element's chemical properties?

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.