How many valence electrons are in an atom of magnesium? (atomic number 12)?

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion

What is the indicator of the number of ions in solution? the amount of conductivity the amount of precipitate the amount of solute added

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!