As you move down through the family of alkali metals, the first ionization energy because A) increases; the atomic radii increase.

B) increases; the atomic radii decrease.

C) decreases; the atomic radii increase.

D) remains constant; all the elements lose one electron.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt