3. Look at the periodic table listing ionic radii trends. Why are the radii changing as you move down the table within one column? Why are the radii
changing as you move across the table from left to right within one row?

Hi + naoh -> h2o + nal

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.

The independent is what is changed, the dependent is was is measured or the reaction.