Question 1

Which of the following best describes the difference between ionic and molecular compounds?

Accepted Answer

Ionic compounds consist of ions held together by ionic bonds, while molecular compounds consist of molecules held together by covalent bonds.

Question 2

A magnesium atom loses two electrons to form a magnesium ion. What is the correct electron arrangement for the resulting ion?

Accepted Answer

$$2,8$$

Question 3

Which of the following ions is formed when a chlorine atom gains one electron?

Accepted Answer

$$\mathrm{Cl}^-$$

Question 4

What is the correct formula for the compound formed between aluminum ions and oxide ions?

Accepted Answer

$$\mathrm{Al}_2\mathrm{O}_3$$

Question 5

Which of the following correctly names the compound $$\mathrm{FeO}$$, given that iron can have variable charges?

Accepted Answer

Iron(II) oxide

Question 6

What is the correct formula for magnesium nitrate?

Accepted Answer

$$\mathrm{Mg(NO}_3)_2$$

Question 7

Which of the following is the correct name for $$\mathrm{Cu}_2\mathrm{S}$$, considering copper's variable charge?

Accepted Answer

Copper(I) sulfide

Question 8

A compound is formed between potassium and bromine. What is its correct chemical formula and name?

Accepted Answer

$$\mathrm{KBr}$$, potassium bromide

Question 9

Which of the following is a polyatomic ion with a $$-2$$ charge?

Accepted Answer

$$\mathrm{SO}_4$$^{2-}$$

Question 10

What is the correct name for $$\mathrm{Ca(NO}_3)_2$$?

Accepted Answer

Calcium nitrate

Question 11

Which of the following formulas represents sodium phosphate?

Accepted Answer

$$\mathrm{Na}_3\mathrm{PO}_4$$

Question 12

A patient is given a medication containing $$\mathrm{FePO}_4. $$What is the correct name for this compound?

Accepted Answer

Iron(III) phosphate

Question 13

Which of the following ions is the only common positively charged polyatomic ion?

Accepted Answer

$$\mathrm{NH}_4^+$$

Question 14

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

Accepted Answer

$$\mathrm{SnCl}_4$$

Question 15

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

Accepted Answer

They are composed of ions held together by strong electrostatic attractions.

Question 16

What is the correct name for $$\mathrm{SnSO}_4$$?

Accepted Answer

Tin(II) sulfate

Question 17

Which of the following is the correct formula for copper(I) oxide?

Accepted Answer

$$\mathrm{Cu}_2\mathrm{O}$$

Question 18

A compound contains $$\mathrm{Na}^+$$ and $$\mathrm{S}^{2-}$$ ions. What is the correct formula for this compound?

Accepted Answer

$$\mathrm{Na}_2\mathrm{S}$$

Question 19

Which of the following is the correct name for $$\mathrm{Al}_2(\mathrm{CO}_3)_3$$?

Accepted Answer

Aluminum carbonate

Ionic and Molecular Compounds: Structure, Naming, and Formulas

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