If I dilute 375 mL of 0.20 M lithium acetate solution to a volume of 500 mL, what will the concentration of this solution be?

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

it's c. elements are placed in rows based on how may valencies electrons have.

idk what the question is about