Q: Arrange the following isoelectronic species in order of increasing radius: K$^+$, Ca$^{2+}$, Ar, Cl$^-$.

K$^+$ < Ca$^{2+}$ < Ar < Cl$^-$

Q: Which energy change in the Born-Haber cycle for the formation of crystalline potassium fluoride corresponds to the electron affinity of fluorine?

The step where F(g) gains an electron to form F$^-$ (g)

Q: Which of the following compounds is named correctly?

Al(CIO$_4$)$_3$ is aluminum perchlorate

Q: Which of the following is a correct name for a covalent compound?

N$_2$O$_4$ is dinitrogen tetroxide

Q: Which of the following statements about polyatomic ions is TRUE?

Ammonium is the only common polyatomic cation.

Q: Which of the following best describes the octet rule?

Atoms tend to gain, lose, or share electrons to achieve a noble gas configuration of $s^2p^6$.

Q: Which of the following is NOT a correct statement about resonance structures?

All resonance structures have different numbers of valence electrons.

Q: Which of the following is a correct statement about the formal charge in Lewis structures?

Formal charge is calculated as: number of valence electrons in free atom minus (number of bonding electrons divided by 2 plus number of nonbonding electrons).

Q: Which of the following best describes the difference between ionic and covalent bonds?

Ionic bonds involve the transfer of electrons and electrostatic attraction between ions, while covalent bonds involve the sharing of electrons.

Question 1

Which of the following pairs of elements is most likely to form an ionic bond?

Accepted Answer

Potassium and oxygen

Question 2

What is the electron configuration for the ion Ti$^{2+}$?

Accepted Answer

$[Ar]3d^2$

Question 3

Which of the following is the correct chemical formula for the ionic compound formed between rubidium and oxygen?

Accepted Answer

Rb$_2$O

Question 4

What is the charge of iron in FeSO$_4$?

Accepted Answer

+2

Question 5

Which of the following ionic compounds would have the largest lattice energy?

Accepted Answer

LiF

Question 6

Which statement best explains why cations are smaller than their parent atoms?

Accepted Answer

Cations lose their outermost electron, reducing electron-electron repulsion.

Question 7

Arrange the following isoelectronic species in order of increasing radius: K$^+$, Ca$^{2+}$, Ar, Cl$^-$.

Accepted Answer

K$^+$ < Ca$^{2+}$ < Ar < Cl$^-$

Question 8

Which energy change in the Born-Haber cycle for the formation of crystalline potassium fluoride corresponds to the electron affinity of fluorine?

Accepted Answer

The step where F(g) gains an electron to form F$^-$ (g)

Question 9

Which of the following bonds is the most polar?

Accepted Answer

C–O

Question 10

In a carbon-oxygen (C–O) bond, which atom will have a partial negative charge?

Accepted Answer

Oxygen

Question 11

How many resonance structures does NO$_3^-$ have?

Accepted Answer

3

Question 12

What is the formal charge on nitrogen in the Lewis structure of NO$_3^-$?

Accepted Answer

0

Question 13

Which is the dominant Lewis structure for the cyanate ion (OCN$^-$)?

Accepted Answer

$[:O=C=N:]^-$

Question 14

Which of the following compounds is named correctly?

Accepted Answer

Al(CIO$_4$)$_3$ is aluminum perchlorate

Question 15

Which of the following is a correct name for a covalent compound?

Accepted Answer

N$_2$O$_4$ is dinitrogen tetroxide

Question 16

Which of the following statements about polyatomic ions is TRUE?

Accepted Answer

Ammonium is the only common polyatomic cation.

Question 17

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve a noble gas configuration of $s^2p^6$.

Question 18

Which of the following is NOT a correct statement about resonance structures?

Accepted Answer

All resonance structures have different numbers of valence electrons.

Question 19

Which of the following is a correct statement about the formal charge in Lewis structures?

Accepted Answer

Formal charge is calculated as: number of valence electrons in free atom minus (number of bonding electrons divided by 2 plus number of nonbonding electrons).

Question 20

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons and electrostatic attraction between ions, while covalent bonds involve the sharing of electrons.

Bonding: General Concepts – Study Notes

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