Question 1

Which of the following best explains why the lattice energy of MgO is much higher than that of NaCl?

Accepted Answer

MgO has ions with higher charges, resulting in a stronger electrostatic attraction.

Question 2

Which of the following compounds contains both a polyatomic cation and a polyatomic anion?

Accepted Answer

NH4NO3

Question 3

What is the correct formula for iron(III) oxide?

Accepted Answer

$$\mathrm{Fe_2O_3}$$

Question 4

Which of the following bonds is expected to be the most polar?

Accepted Answer

$$\mathrm{HF}$$

Question 5

A compound is found to have the formula $$\mathrm{Ca_3$(PO_4$)_2}. $$What is the charge on the phosphate ion?

Accepted Answer

$$-3$$

Question 6

Which of the following best describes the electron configuration of the chloride ion ($$\mathrm{Cl^-}$$)?

Accepted Answer

$$1s^22s^22$p^63s^23$p^6$$

Question 7

Which of the following is the correct name for $$\mathrm{$$CuSO_4$$ \cdot 5H_2O}$$?

Accepted Answer

Copper(II) sulfate pentahydrate

Question 8

Which of the following molecules has a triple bond in its Lewis structure?

Accepted Answer

$$\mathrm{N_2$}$$

Question 9

What is the systematic name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 10

Which of the following best describes the trend in electronegativity across a period in the periodic table?

Accepted Answer

Electronegativity increases from left to right.

Question 11

Which of the following compounds is classified as a hydrate?

Accepted Answer

$$\mathrm{$$CuSO_4$$ \cdot 5H_2O}$$

Question 12

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

Accepted Answer

$$\mathrm{Na^+}$$

Question 13

Which of the following best describes the bond in $$\mathrm{ClF}$$ based on electronegativity difference?

Accepted Answer

Polar covalent

Question 14

What is the correct name for $$\mathrm{$$HClO_3$$}$$?

Accepted Answer

Chloric acid

Question 15

Which of the following best explains why $$\mathrm{LiF}$$ has a higher lattice energy than $$\mathrm{KF}$$?

Accepted Answer

Li+ is smaller than K+, resulting in a shorter distance between ions.

Question 16

Which of the following is the correct Lewis dot symbol for the sulfide ion ($$\mathrm{S$$^{2-}$$}$$)?

Accepted Answer

S with 8 dots and a $$2-$$ charge

Question 17

Which of the following is the correct formula for aluminum sulfate?

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 18

Which of the following best describes the bond in $$\mathrm{CsBr}$$?

Accepted Answer

Ionic

Question 19

What is the correct name for $$\mathrm{SO_2$}$$?

Accepted Answer

Sulfur dioxide

Question 20

Which of the following best describes why metals are good conductors of electricity?

Accepted Answer

They have loosely held valence electrons that can move freely.

Chemical Bonding and Molecular Geometry: Ionic and Covalent Compounds

Guida di studio - Domande di pratica