Atomic Numbers and Electron Configurations

Question 1

For the n = 3 electron shell, which of the following quantum numbers are valid? Check all that apply.

Revolt · Accepted Answer

C: l = 0; D: m = –2; F: m = 2

Question 2

Which diagram shows the correct electron configuration for nitrogen (N)?

Revolt · Accepted Answer

B: A group of five short lines. The first line has an up and a down arrow above it and is labeled 1 s below. The second line has an up and a down arrow and is labeled 2 s. The third, fourth, and fifth lines each have an up arrow and are bracketed with the label 2 p.

Question 3

1s22s22p6: ⇒ Ne 1s22s22p63s23p3: 1s22s22p63s23p64s1: 1s22s22p63s23p64s23d8: 1s22s22p63s23p64s23d104p65s24d3:

Revolt · Accepted Answer

1s22s22p63s23p3:: P; 1s22s22p63s23p64s1:: K; 1s22s22p63s23p64s23d8:: Ni; 1s22s22p63s23p64s23d104p65s24d3:: Nb

Question 4

B: 1s2 2sA2pBA = B =

Revolt · Accepted Answer

Part 1: 2; Part 2: 1

Question 5

The electron configuration for aluminum (Al) is shown below:1s22s22p63s23p1Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?

Revolt · Accepted Answer

C: An orange dot has 3 concentric circles surrounding it. The innermost circle has green dots at the north and south positions. The center circle has 8 dots spaced unevenly. The outer circle has three dots, spaced so that two are closer to each other than either is to the third.

Question 6

What rule/principle states that electrons fill orbitals from lowest energy to highest energy?

Revolt · Accepted Answer

A: Aufbau principle

Question 7

Which of the following sets of quantum numbers describe valid orbitals? Check all that apply.

Revolt · Accepted Answer

A: n = 1, l = 0, m = 0; D: n = 3, l = 0, m = 0; E: n = 5, l = 4, m = –3

Question 8

Which diagram shows the correct electron configuration for fluorine (F)?

Revolt · Accepted Answer

A: A group of five short lines. The first line has an up and a down arrow above it and is labeled 1 s below. The second line has an up and a down arrow and is labeled 2 s. The third and fourth lines each have an up and a down arrow; the fifth line has an up arrow . The third, fourth, and fifth lines are bracketed with the label 2 p.

Question 9

1s22s22p63s23p3:

Revolt · Accepted Answer

P

Question 10

B =

Revolt · Accepted Answer

1

Atomic Numbers and Electron Configurations Answers

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