Question 1

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal, while covalent bonds involve the sharing of electrons between two nonmetals.

Question 2

What is the correct formula for the ionic compound formed between magnesium and nitrogen?

Accepted Answer

$$\mathrm{Mg}_2\mathrm{N}_3$$

Question 3

Which of the following ions has the same number of electrons as argon ($$\mathrm{Ar}$$)?

Accepted Answer

$$\mathrm{Na}^+$$

Question 4

What is the name of the compound $$\mathrm{Fe}_2\mathrm{O}_3$$?

Accepted Answer

Iron(III) oxide

Question 5

Which of the following is the correct Lewis structure for methane ($$\mathrm{CH}_4$$)?

Accepted Answer

A central carbon atom with four single bonds to four hydrogen atoms, and no lone pairs on carbon.

Question 6

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO}_2$$

Question 7

What is the strongest intermolecular force present in ammonia ($$\mathrm{NH}_3$$)?

Accepted Answer

Hydrogen bonding

Question 8

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity increases from left to right across a period and increases from bottom to top in a group.

Question 9

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{Na}_2\mathrm{SO}_4$$

Question 10

What is the molecular geometry and bond angle of $$\mathrm{CO}_2$$?

Accepted Answer

Linear, $$180^\circ$$

Question 11

Which of the following best explains why $$\mathrm{H}_2\mathrm{O} is a $$polar molecule?

Accepted Answer

It contains polar bonds and the dipoles do not cancel due to its bent shape.

Question 12

Which of the following is the correct formula for aluminum carbonate?

Accepted Answer

$$\mathrm{Al}_2(\mathrm{CO}_3)_3$$

Question 13

Which of the following molecules has a trigonal pyramidal molecular shape?

Accepted Answer

$$\mathrm{NH}_3$$

Question 14

What is the correct name for $$\mathrm{N}_2\mathrm{O}_5$$?

Accepted Answer

Dinitrogen pentoxide

Question 15

Which of the following bonds is considered ionic based on electronegativity difference?

Accepted Answer

$$\mathrm{Na}-\mathrm{F} ($$AEN = 3.1)

Question 16

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

Accepted Answer

$$\mathrm{Ca}_3(\mathrm{PO}_4)_2$$

Question 17

Arrange the following compounds in order of increasing melting point: $$\mathrm{CO}_2$$, $$\mathrm{H}_2\mathrm{O}$$, $$\mathrm{NaCl}.$$

Accepted Answer

$$\mathrm{CO}_2 \u003c \mathrm{H}_2\mathrm{O} \u003c \mathrm{NaCl}$$

Question 18

Which of the following is an exception to the octet rule?

Accepted Answer

Boron in $$\mathrm{BF}_3$$

Question 19

Which of the following molecules has a bent molecular shape and a bond angle close to $$109^\circ$$?

Accepted Answer

$$\mathrm{H}_2\mathrm{O}$$

chapter 6 part 1

Guida di studio - Domande di pratica

Study guide - Flashcard