18. Write the values for the quantum numbers for the bold electron in the following diagram: 4d orbitals 19. Write the electron configurations for the neutral element and the most likely ion of each: For example the most likely ion of Cl is Cl Neutral a. K b. F c. Co d. Al e. Pb ion 20. Cr has 6 unpaired electrons. Write the electron configuration and orbital diagram (boxes with arrows) for Cr. (a) p3- (b) Mg2+ (c) 0²- (d) Rb+ (e) Cu²+ for Mg. In particular, kJ/mole 21. Using complete subshell notation (1s²2s22p6, and so forth), predict the electron configurations of the following ions.

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