Homework 3: Electronic Structure

Give the numbers for ml for a p orbital.

-1,0,+1

The complete electron configuration of gallium, element 31, is ________.

1s^22s^22p^63s^23p^63d^104s^24p^1

Write the correct electron configuration for As.

1s^22s^22p^63s^23p^64s^23d^104p^3

How many valence electrons does an atom of Tl possess?

3

List a possible set of four quantum numbers (n, ℓ, mℓ, ms) in order, for the highest energy electron in gallium, Ga.

4,1,-1,1/2

How many valence electrons does an atom of N have?

5

How many subshells are there in the shell with n = 6?

6

How many orbitals are contained in the third principal level (n = 3) of a given atom?

9

Which element has the ground-state electron configuration [Xe]6s^2 4f^ 7?

Eu

Part A S Part B As Part C Sr Part D Sb

Part A - [Ne]3s^23p^4 Part B - [Ar]4s^23d^104p^3 Part C - [Kr]5s^2 Part D - [Kr]5s^24d^105p^3

Part A [Ar]4s23d104p5 Part B [Ar]4s23d1 Part C [Kr]5s24d105p2 Part D [Xe]6s2

Part A -Br Part B - Sc Part C -Sn Part D - Ba

Part A Determine the number of 3s electrons in Na. Part B Determine the number of 3d electrons in V. Part C Determine the number of 4d electrons in Y. Part D Determine the number of 6p electrons in Pb.

Part A - 1 Part B - 3 Part C - 1 Part D - 2

Learning Goal: To learn to create orbital-filling diagrams. Part A How many orbitals are there in the third shell (n=3)? Part B Show the orbital-filling diagram for N (nitrogen). Order subshells by energy, with the lowest-energy subshell at the left. Drag the appropriate labels to their respective targets. Part C Show the orbital-filling diagram for S (sulfur). Order subshells by energy, with the lowest-energy subshell at the left. Drag the appropriate labels to their respective targets.

Part A - 9 Part B II II I I I 1s, 2s, 2p Part C II II II II II II II I I 1s 2s 2p 3s 3P

Part A What are the possible values of the magnetic quantum number ml? Part B What does the magnetic quantum number determine? Check all that apply.

Part A - all the integers in range from -l to +l, where l is an angular momentum quantum number Part B - the orientation of the orbital

Part A What are the possible values of the angular momentum quantum number l? Part B What does the angular momentum quantum number determine in a hydrogen atom? Check all that apply.

Part A - all the non-negative integers: 0,1,2,..., n-1, where n is a principal quantum number Part B -the shape of the orbital

Part A What are the possible values of the principal quantum number n? Part B What does the principal quantum number determine? Check all that apply.

Part A - all the positive integers: 1,2,3, etc. Part B - the energy of an orbital - the overall size of an orbital

Part A Select the sketch of the 1s orbital. Part B Select the sketch of one of the 2p orbitals. Part C How do the 2s and 3p orbitals differ from the 1s and 2p orbitals? Match the words in the left column to the appropriate blanks in the sentences on the right.

Part A - blue circle Part B - 2 red Part C - The 2 s orbital would be the same shape as the 1 s orbital but would be larger in size, and the 3 p orbitals would have the same shape as the 2 p orbitals but would be larger in size. Also, the 2s and 3p orbitals would have more nodes.

Part A Which of the following outer electron configurations would you expect to belong to a reactive metal? Part B Which of the following electron configurations would you expect to belong to a reactive nonmetal?

Part A - ns^1 Part B - ns^2np^5

Part A,B,C,D Determine the number of valence electrons for each of the following four elements. Ga , Sn , Cl , N Part E Which elements do you expect to lose electrons in their chemical reactions? Which do you expect to gain electrons?

Part A,B,C,D - 3,4,7,5 Part E - Tend to Gain = Cl, N -Tend to Lose = Ga, Sn

Which of the following combinations of n and l represent real orbitals and which are impossible

Real - 5d, 2s, 1s Impossible - 2d

The condensed electron configuration of krypton, element 36, is ________.

[Ar]3d^104s^24p^6

Give the set of four quantum numbers that represent the last electron added (using the Aufbau principle) to the Zn atom.

n = 3, l = 2, ml = 2, ms = -1/2

Each of the following sets of quantum numbers is supposed to specify an orbital. Which of the following sets of quantum numbers contains an error?

n = 3, l = 3, ml = -1

Identify the correct values for a 4f orbital.

n = 4, l = 3, ml = 2

What are the four quantum numbers for each of the two electrons in a 4s orbital? For first electron: For second electron:

n=4, l=0, ml=0, ms=+1/2 n=4, l=0, ml=0, ms=−1/2