Consider the orbital diagram for oxygen in Model 2. a. How many electrons are present in the orbital diagram?
b. Based on its position in the periodic table, explain how you know that your answer to part a is the correct number of electrons for oxygen.

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the correct answer would be d. hope this !

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l