Question 1

Which of the following best describes the bonding in sodium chloride (NaCl)?

Accepted Answer

Ionic bonding, where sodium cations and chlorine anions are attracted by opposite charges.

Question 2

What is the correct chemical formula for a compound formed between aluminum ions ($$\mathrm{Al$$^{3+}$$}) $$and chloride ions ($$\mathrm{Cl^-}$$)?

Accepted Answer

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

Question 3

Which statement about covalent bonds is correct?

Accepted Answer

Covalent bonds involve the sharing of electron pairs between nonmetal atoms.

Question 4

A compound is formed between calcium ions ($$\mathrm{Ca$$^{2+}$$}) $$and nitride ions ($$\mathrm{N$$^{3-}$$}). $$What is the correct formula for this compound?

Accepted Answer

$$\mathrm{Ca_3N_2}$$

Question 5

Which of the following is a property of metallic bonding?

Accepted Answer

A sea of electrons surrounds metal cations, allowing for conductivity.

Question 6

What is the correct name for the compound $$\mathrm{Na_2O}$$?

Accepted Answer

Sodium oxide

Question 7

Which of the following compounds is composed entirely of nonmetals and involves sharing of electrons?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 8

If a compound is named 'calcium nitride', what is the correct way to determine its formula?

Accepted Answer

Combine the symbols and use the charges to balance the total charge to zero, then reduce subscripts to lowest terms.

Question 9

Which of the following best explains why ionic compounds are electrically neutral?

Accepted Answer

The sum of the positive and negative charges in the formula equals zero.

Question 10

What is the correct formula for a compound formed between sodium ($$\mathrm{Na^+}) $$and oxygen ($$\mathrm{O$$^{2-}$$}$$)?

Accepted Answer

$$\mathrm{Na_2O}$$

Question 11

Which of the following is NOT a correct description of an ionic bond?

Accepted Answer

It involves the sharing of electron pairs between atoms.

Question 12

When writing the chemical formula for an ionic compound, which rule must be followed?

Accepted Answer

The subscripts must reflect the lowest whole number ratio that results in a neutral compound.

Question 13

Which of the following compounds contains a metallic bond?

Accepted Answer

$$\mathrm{Fe} ($$iron metal)

Question 14

What is the correct name for the compound $$\mathrm{Ca_3N_2}$$?

Accepted Answer

Calcium nitride

Question 15

Which of the following is a correct statement about the formation of cations and anions?

Accepted Answer

Cations are formed when metals lose electrons; anions are formed when nonmetals gain electrons.

Question 16

Which of the following best describes the electron arrangement in metallic bonding?

Accepted Answer

Electrons are delocalized and move freely among a lattice of metal cations.

Question 17

If you are given the name 'sodium oxide', what is the correct formula and why?

Accepted Answer

$$\mathrm{Na_2O}$$, because two sodium ions ($$+1$$ each) balance one oxide ion ($$-2).$$

Question 18

Which of the following is the correct way to name an ionic compound?

Accepted Answer

Use the cation name followed by the anion name.

Question 19

Which of the following is a real-world property explained by metallic bonding?

Accepted Answer

The ability of metals to conduct electricity.

Question 20

Which of the following is true about the subscripts in chemical formulas for ionic compounds?

Accepted Answer

They indicate the number of atoms needed to balance the charges to zero.

Introduction to Chemical Compounds and Bonding

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