Question 1

Predict the charge that an aluminum ion (Al, Z = 13) would have.

Accepted Answer

3+

Question 2

Predict the charge that an ion formed from sulfur (S, Z = 16) would have.

Accepted Answer

2-

Question 3

Which of the following statements is FALSE?

Accepted Answer

The halogens tend to form 1+ ions.

Question 4

In a ground state atom, no two electrons can have the same four quantum numbers is known as

Accepted Answer

the Pauli exclusion principle.

Question 5

The "building up" of the electron configuration by filling orbitals from the lowest energy first is known as

Accepted Answer

the Aufbau principle.

Question 6

When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as

Accepted Answer

Hund’s rule.

Question 7

According to Coulomb's law, if the separation between two particles is unchanged but the charge of each is doubled, the potential energy of the system

Accepted Answer

goes up by a factor of 4

Question 8

Which of the following best describes why anions are larger than their parent atoms?

Accepted Answer

Anions have more electrons, increasing electron-electron repulsion and expanding the electron cloud.

Question 9

Which principle explains why electrons fill the 4s orbital before the 3d orbital?

Accepted Answer

Aufbau principle

Question 10

A sodium atom (Na, Z = 11) loses one electron to form a cation. Which of the following is true about the resulting ion?

Accepted Answer

It has the same electron configuration as neon.

Question 11

Which of the following is a real-world application of Hund's rule?

Accepted Answer

Explaining the color of transition metal complexes.

Question 12

Which of the following ions is isoelectronic with argon ($$\mathrm{Ar}$$)?

Accepted Answer

$$\mathrm{K^+}$$

Question 13

If the charge on one particle is tripled and the other is unchanged, by what factor does the potential energy change according to Coulomb's law?

Accepted Answer

It triples.

Question 14

Which quantum number determines the shape of an orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 15

Which of the following best explains why metals tend to form cations?

Accepted Answer

Metals have low ionization energies, making it easier to lose electrons.

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