Question 1

Which of the following best explains why sodium chloride (NaCl) conducts electricity when dissolved in water, but not in its solid form?

Accepted Answer

The ions in aqueous NaCl are free to move, allowing electrical conductivity.

Question 2

Which of the following ions is most likely to form based on the octet rule and periodic trends?

Accepted Answer

$$\mathrm{Sr$$^{2+}$$}$$

Question 3

What is the correct electron configuration for the magnesium ion ($$\mathrm{Mg$$^{2+}$$}$$)?

Accepted Answer

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

Question 4

Which of the following best describes the process by which a chlorine atom becomes a chloride ion?

Accepted Answer

It gains one electron to achieve a noble gas configuration.

Question 5

Which of the following is the correct formula for the compound formed between calcium ions and nitrate ions?

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 6

What is the correct name for the compound $$\mathrm{$$FeCl_3$$}$$ using the modern (Stock) system?

Accepted Answer

Iron(III) chloride

Question 7

Which of the following statements about ionic compounds is FALSE?

Accepted Answer

They conduct electricity in the solid state.

Question 8

Which of the following ions is a polyatomic ion?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 9

A solution contains $$\mathrm{K_2SO_4}. $$Which ions are present when this compound dissolves in water?

Accepted Answer

$$2\ \mathrm{K^+}$$\ and $$1\ \mathrm{SO_4$^{2-}}$$

Question 10

Which of the following best explains why group 1A metals form $$+1$$ ions?

Accepted Answer

They have one valence electron, which they lose to achieve a noble gas configuration.

Question 11

Which of the following is the correct formula for magnesium phosphate?

Accepted Answer

$$\mathrm{Mg_3$(PO_4$)_2}$$

Question 12

Which of the following acids can provide three $$\mathrm{H^+}$$ ions per molecule?

Accepted Answer

Phosphoric acid ($$\mathrm{H_3PO_4})$$

Question 13

Which of the following best describes the difference between a cation and an anion?

Accepted Answer

A cation is a positively charged ion, and an anion is a negatively charged ion.

Question 14

Which of the following compounds is a base that can provide two $$\mathrm{OH^-}$$ ions per formula unit?

Accepted Answer

Barium hydroxide ($$\mathrm{Ba(OH)_2})$$

Question 15

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

Accepted Answer

Copper(II) sulfate

Question 16

Which of the following best explains why ionic solids shatter when struck sharply?

Accepted Answer

The rigid arrangement of oppositely charged ions causes repulsion when layers shift.

Question 17

Which of the following is the correct formula for sodium phosphate?

Accepted Answer

$$\mathrm{Na_3PO_4}$$

Question 18

Which of the following ions is NOT biologically important according to the provided table?

Accepted Answer

$$\mathrm{Pb$$^{2+}$$}$$

Question 19

Which of the following best describes the role of ionization energy in the formation of cations?

Accepted Answer

Low ionization energy means an atom easily loses electrons to form cations.

Question 20

Which of the following is the correct name for $$\mathrm{$$MgCO_3$$}$$?

Accepted Answer

Magnesium carbonate

Ionic Compounds and Ion Formation: Structured Study Notes for General Chemistry

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