Question 1

Which of the following best describes the process that occurs when NaCl dissolves in water, as shown in the first image?

Accepted Answer

Na+ and Cl– ions are released and surrounded by water molecules, allowing the solution to conduct electricity.

Question 2

Refer to the periodic table image showing group charges. What is the expected charge for an ion formed by an element in group 2A?

Accepted Answer

$$+2$$

Question 3

Which electron configuration represents a sodium cation ($$\mathrm{Na^+}) $$after it loses one electron, as shown in the fifth image?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$

Question 4

What is the correct formula for the compound formed between magnesium and oxygen, as referenced in the handwritten note image?

Accepted Answer

$$\mathrm{MgO}$$

Question 5

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

Accepted Answer

$$\mathrm{S$$^{2-}$$}$$

Question 6

What is the systematic name for $$\mathrm{Fe_2$(SO_4$)_3}$$, as shown in the practice problem?

Accepted Answer

Iron(III) sulfate

Question 7

Which of the following best describes the physical properties of ionic compounds like NaCl, as shown in the third image?

Accepted Answer

They are crystalline solids with high melting and boiling points.

Question 8

What is the correct formula for the compound formed between aluminum and chlorine using the criss-cross method?

Accepted Answer

$$\mathrm{$$AlCl_3$$}$$

Question 9

Which polyatomic ion is present in sodium bicarbonate ($$\mathrm{$$NaHCO_3$$}$$)?

Accepted Answer

Hydrogen carbonate ($$\mathrm{$$HCO_3$$^-})$$

Question 10

A transition metal forms two ions: $$\mathrm{Fe$$^{2+}$$}$$ and $$\mathrm{Fe$$^{3+}$$}. $$What are their common names?

Accepted Answer

Ferrous and Ferric

Question 11

Which of the following compounds contains a polyatomic ion and is electrically neutral?

Accepted Answer

$$\mathrm{Na_2CO_3}$$

Question 12

What is the correct formula for tin(IV) oxide?

Accepted Answer

$$\mathrm{$$SnO_2$$}$$

Question 13

Which of the following best explains why ionic compounds conduct electricity when dissolved in water?

Accepted Answer

The ions are free to move and carry charge in solution.

Question 14

What is the charge on the phosphate ion ($$\mathrm{PO_4$}) as $$shown in the polyatomic ion table?

Accepted Answer

$$-3$$

Question 15

Which of the following ions would be formed by an element in group 7A?

Accepted Answer

$$\mathrm{F^-}$$

Question 16

What is the correct name for $$\mathrm{Cr_2O_3}$$ according to the systematic naming rules?

Accepted Answer

Chromium(III) oxide

Question 17

Which of the following best describes the difference between cations and anions?

Accepted Answer

Cations have fewer electrons than protons, while anions have more electrons than protons.

Question 18

Which formula represents a compound containing the ammonium ion ($$\mathrm{NH_4$^+}) $$and sulfate ion ($$\mathrm{SO_4$^{2-}}$$)?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 19

Which of the following is the correct electron configuration for a chloride anion ($$\mathrm{Cl^-}) $$after gaining one electron, as shown in the sixth image?

Accepted Answer

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

Question 20

Which of the following best describes the smallest unit of an ionic compound?

Accepted Answer

A formula unit

Ionic and Molecular Compounds: Structure, Formation, and Nomenclature

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