Homework3

# Homework3 - MSE 110 Problem Set 3 Problem 1 Which of the...

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MSE 110 Problem Set 3, Problem 1 Which of the following atom has the largest number of unpaired electron in its ground state configuration? (8 pts) [answer A, B, C, D, E] A C B Ta C As D Fe E Co Ans: . Following Hund’s rule, C has 2 unpaired electrons on the 2p orbitals Ta has 3 unpaired electrons on the 5d orbitals As has 3 unpaired electrons on the 4p orbitals Fe has 4 unpaired electrons on the 3d orbitals Co has 3 unpaired electrons on the 3d orbitals Hence, Fe has the highest number of unpaired electrons Problem 2 How many unpaired electrons are there on the Mn atom in its ground state configuration? (8 pts) [Answer A, B, C, D, E] A 2 B 5 C 0 D 7 E 3 Ans: . Following Hund’s rule, there are 5 unpaired electrons on the 3d orbital of the Mn atom. 1

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Problem 3 Which one of the following sets of four quantum number n, l, m, s describes the one of the outermost electron in a ground state Ba atom? (10 pts) [Answer A, B, C, D, E] A 6,3,-2,½ B 6,0,1,-½ C 6,0,0,½ D 6,1,0,½ E 6,2,1,-½ Ans: The outermost orbital of Ba is the 6s, it is a spherical orbital with quantum number n=6, l=0, m=0 and s=½ or -½. Answer is C.
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Homework3 - MSE 110 Problem Set 3 Problem 1 Which of the...

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