Question 1

Which element is represented by the orbital diagram shown in the second image (with three unpaired electrons in the 3p orbitals)?

Accepted Answer

Phosphorus (P)

Question 2

What is the condensed ground-state electron configuration for the element represented by the orbital diagram in the third image?

Accepted Answer

$$[Ne] 3s^2$ 3p^3$

Question 3

How many unpaired electrons are present in the element shown in the second image's orbital diagram?

Accepted Answer

3

Question 4

Which quantum numbers describe the last electron added in the element represented by the second image's orbital diagram?

Accepted Answer

$$n=3, \ell=1, m_\ell=+1, m_s=+\frac{1}{2}$$

Question 5

Which principle explains why each 3p orbital in the second image is singly occupied before any pairing occurs?

Accepted Answer

Hund's Rule

Question 6

If the element in the second image gains three electrons to form an anion, what would be its new electron configuration?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^6$$

Question 7

Which of the following statements about the orbital diagram in the third image is correct?

Accepted Answer

It represents a neutral sodium atom.

Question 8

What is the total number of electrons represented in the orbital diagram in the third image?

Accepted Answer

11

Question 9

Which of the following best describes the difference between the two orbital diagrams shown in the second and third images?

Accepted Answer

The second image has three unpaired electrons in the 3p orbitals, while the third image has none.

Question 10

Which element is most likely to have the orbital diagram shown in the third image?

Accepted Answer

Sodium (Na)

Quantum-Mechanical Model of the Atom: Study Guidance

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