What is the difference between an atom in the ground state and an atom in an excited state?
a. the atom in the ground state has less energy and is less stable than the atom in an excited state.
b. the atom in an excited state has one fewer electron than the atom in the ground state.
c. the atom in an excited state has more energy and is less stable than the atom in the ground state.
d. the atom in an excited state has one more electron than the atom in the ground state.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.

Complete each row of the table below by filling in the missing prefix or missing exponent.

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.