Chapter 8 - Covalent Bonding

T/F: In covalent compounds, atoms become chemically stable by sharing their valence electrons.

True

T/F: Noble gases are generally non-reactive because they already have a complete valence shell.

True

T/F: A diatomic molecule is one that is made of only two different elements.

False

T/F: The breaking of covalent bonds requires the input of energy.

True

T/F: In a correct Lewis structure, no atom can have more than eight valence electrons surrounding it.

False

T/F: Hybrid orbitals result from the mixing of atomic orbitals to hold lone electron pairs and single electrons available for bonding.

True

T/F: A double bond occupies two hybrid orbitals.

False

T/F: Electron affinity is the likelihood of an atom to accept an electron.

True

T/F: Electron affinity and electronegativity are opposite of one another.

False

T/F: Electrons in a covalent bond are shared equally between the two atoms forming the bond.

False

T/F: All compounds with polar covalent bonds are polar molecules.

False

T/F: An oxyacid is composed of a hydrogen atom bonded to a polyatomic anion.

True

T/F: All noble gases have the same valence electron configuration.

False

T/F: An oxygen atom, having electron configuration 1s 2s 2p , forms a single bond with another oxygen atom.

False

T/F: A sigma bond is formed between two atoms when the valence atomic orbital of one tom overlaps end-to-end with that of the other atom.

True

T/F: All of the bond lengths in a compound having resonating structures are identical.

False

T/F: An expanded octet is possible using the p-orbital of an element.

False

T/F: The bond angle for a molecule with sp hybridization atom is always 109.5 degrees.

False

T/F: Hybrid orbitals of an atom are identical and contain one electron each.

True

T/F: The molecules H O and CCl are nonpolar, as the central atoms, O and C, respecctively, are sp hybridized.

False

How many single covalent bonds are elements in Column F likely to form?

A. 1 B. 2 C. 3 D. 4

B

Which combination of bonds is present in this molecule?

A. 1 sigma bond only C. 2 pi bonds

B. 1 sigma bond & 1 pi bond D. 1 sigma bond & 2 pi bonds

B

Which is true of the bond length of these covalent molecules?

A. The bonds in A are longer than the bonds in B or C

B. The bods in C are the same length as the bonds in B

C. The bonds in B are longer than the bonds in A or C

D. The relative bond length of these compounds can't be determined

A

Which covalent molecule has the strongest bond?

A. A B. B C. C D. They are all equally strong

B

Which exception to the octet rule is shown by this molecule?

A. uneven number of valence electrons

B. suboctet

C. expanded octet

D. coordinate covalent bond

B

Which exception ti the octet rule is shown by this molecule?

A. uneven number of valence electrons

B. suboctet

C. expanded octet

D. coordinate covalent bond

D

Which type of molecular shape is shown by this molecule?

A. trigonal pyramidal C. bent

B. tetrahedral D. trigonal planar

A

Which type of molecular shape is shown by this molecule?

A. trigonal pyramidal C. trigonal bipyramidal

B. tetrahedral D. octahedral

C

Which is NOT a diatomic molecule?

A. Fluorine C. Bromine

B. Nitrogen D. Boron

D

Which type of bond has one pair of electrons shared between atoms?

A. single covalent C. double covalent

B. coordinate covalent D. metallic

A

How many single covalent bonds can carbon form?

A. 1 B. 2 C. 3 D. 4

D

How many single covalent bonds can halogens form?

A. 1 B. 2 C. 3 D. 4

A

Multiple covalent bonds consist of which of these?

A. 1 sigma bond only C. three pi bonds only

B. 1 or 2 sigma bonds & a pi bond D. 1 sigma bond & 1 pi bond

B

In the compound PCl , how many total valence electrons are present?

A. 4 B. 8 C. 24 D. 26

D

How many valence electrons are available in NO ?

A. 16 B. 9 C. 22 D. 24

D

Which type of bond has an electronegativity difference greater than 1.7?

A. ionic C. nonpolar covalent

B. metallic D. polar covalent

A

What is the electronegativity difference ion the compound Aluminum Chloride, AlCl ?

A. 4.77 B. 3.16 C. 7.87 D. 1.55

D

Based on its electronegativity difference, which kind of bond is present in the compound OF ?

A. ionic C. polar covalent

B. metallic D. nonpolar covalent

D

Covalent compounds display which of these properties?

A. They are hard, brittle solids

B. They have high melting and boiling points

C. They display luster

D. Their intermolecular forces are relatively weak

D

How many pairs of bonding electrons are in a molecule that displays sp hybridization?

A. 2 B. 3 C. 4 D. 5

B

How many pairs of bonding electrons are present in a molecule that displays trigonal bypyramidal molecular shape?

A. 3 B. 4 C. 5 D. 6

C

What molecular shape does the compound CCl have?

A. trigonal planar C. trinitrogen dioxide

B. tetrahedral D. dinitrogen trioxide

B

Which is the correct name for the compound N 0 ?

A. Dinitro trioxide C. Trinitrogen dioxide

B. Nitrogen (II) oxide (III) D. Dintrogen trioxide

D

Which is the correct name for the compound PCl ?

A. monophosphorus tetrachloride C. phosphoris pentachloride

B. phosphorus chloride D. pentaphosphorus chloride

C

Which is the correct name for the compound N O ?

A. tetranitrogen dioxide C. dinitrogen quaoxide

B. dinitrogen tetroxide D. nitrogen oxide

B

Which is the correct formula for the compound dinitrogen monoxide?

A. NO C. N O

B. (NO) D. N O

D

Which is the formula for the compound sulfur hexachloride?

A. S Cl C. SCl

B. SCl D. S Cl

B

Which is the correct name for the compound HClO ?

A. hydrogen chlorate B. caloric acid C. hydrogen chloride trioxide D. hydrochloric acid

B

Which is the correct name for the compound HNO ?

A. hyponitrous acid B. hydronitrogen dioxide C. nitrous acid D. hydronitroc acid

C

Which is the correct formula for the compound phosphoric acid?

A. H P B. HPO C. H PO D. H PO

C

Identify the correct structure of NO ?

D

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

A. BH B. CH C. NH D. H O

A

A compound BeCl uses so orbital of Be atom. Which of the following is the correct bond angle in the compound?

A. 104.5 B. 109.5 C. 120 D. 180

D

When a chemical bond is formed, the constituent atoms acquire the valence electron configurations of noble gases called ______.

octet

In naming the compound PCl , the prefix used with the second element is ____.

penta

The second part of the name of the compound NF is _____.

triflouride

The name of the acid HI is ______.

hydroiodic

In the reaction between BF and NH , a ________ type of bond is formed.

coordinate covalent