How does shielding impact the strength of attraction between the nucleus and the valence electrons?

Explain what happens at the saturation point when adding salt to water at room temperature.

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule