Question 1

Which of the following best describes an ionic compound?

Accepted Answer

A compound formed by the transfer of electrons from a metal to a nonmetal, resulting in oppositely charged ions.

Question 2

What is the charge on a chloride ion after a chlorine atom gains one electron?

Accepted Answer

$$-1$$

Question 3

Which of the following ions has the same electron configuration as neon ($$Ne$$)?

Accepted Answer

$$Na^+$$

Question 4

What is the formula for the ionic compound formed between magnesium ($$Mg^{2+}) $$and chloride ($$Cl^-) $$ions?

Accepted Answer

$$MgCl_2$$

Question 5

Which statement about the properties of ionic compounds is FALSE?

Accepted Answer

Ionic compounds have low melting points.

Question 6

What is the correct name for the compound $$FeCl_3$$?

Accepted Answer

Iron(III) chloride

Question 7

Which of the following best explains why Group VIIA elements (halogens) tend to form $$-1$$ anions?

Accepted Answer

They have seven electrons in their outermost shell and need to gain one to achieve a stable octet.

Question 8

Which of the following is a polyatomic ion?

Accepted Answer

$$SO_4$$^{2-}$$

Question 9

What is the formula for aluminum sulfate?

Accepted Answer

$$Al_2$$($$SO_4)_3$

Question 10

Which of the following best describes a base according to the Arrhenius definition?

Accepted Answer

A substance that provides $$OH^-$$ ions in water.

Question 11

Which of the following ions is a cation?

Accepted Answer

$$Na^+$$

Question 12

What is the correct formula for the ionic compound formed between potassium ($$K^+) $$and phosphate ($$PO_4$$^{3-}$$) ions?

Accepted Answer

$$K_3PO_4$$

Question 13

Which of the following statements about the dissolution of NaCl in water is TRUE?

Accepted Answer

NaCl dissociates into $$Na^+$$ and $$Cl^-$$ ions, which move freely and conduct electricity.

Question 14

Which of the following is the correct electron configuration for a Group IIA element?

Accepted Answer

$$ns^2$$

Question 15

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain or lose electrons to achieve eight electrons in their outermost shell.

Question 16

Which of the following is the correct name for $$NH_4$$^+$$?

Accepted Answer

Ammonium ion

Question 17

A patient is given a solution containing $$NaHCO_3. $$What is the name of the anion present in this compound?

Accepted Answer

Hydrogen carbonate ion

Question 18

Which of the following ions is most likely to be formed by a Group IA element?

Accepted Answer

$$+1$$ cation

Question 19

Which of the following best explains why ionic compounds have high melting points?

Accepted Answer

They are held together by strong electrostatic attractions between oppositely charged ions.

Question 20

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

Accepted Answer

$$Ca_3$$($$PO_4)_2$

Chap 3 Ionic Compounds: Structure, Formation, and Properties

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