elements a, b and c have following relations. b is in the same group as a and b’s period number is larger than a’s. c is in the same period as b and c’s atomic number is less than b’s. the relation of their atomic radii is:

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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.

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