Chapter 9: Mastering

Define electronegativity. A) the ability of an atom to repel neutrons in a chemical bond B) the ability of an atom to attract electrons to itself in a chemical bond C) the ability of an atom to attract neutrons to itself in a chemical bond D) the ability of an atom to repel electrons in a chemical bond E) the ability of an atom to attract protons to itself in a chemical bond

B) the ability of an atom to attract electrons to itself in a chemical bond

A single covalent bond contains A) 4 pairs of protons. B) 2 pairs of electrons. C) 1 pair of electrons. D) 0 pairs of neutrons. E) 1 pair of protons.

C) 1 pair of electrons.

The phosphorus atom in PCl3 would be expected to have a A) 3+ charge. B) 3- charge. C) partial positive (δ+) charge. D) partial negative (δ-) charge.

C) partial positive (δ+) charge.

Give the number of valence electrons for XeI2. A) 18 B) 24 C) 16 D) 22 E) 20

D) 22

Part complete Identify the compound that has polar bonds, but a dipole moment of 0. A) O2 B) Zn C) Ar D) CF4 E) KF

D) CF4

Part complete Which of the species below will exhibit resonance? CO2, CO3^2−, NO3 ^−, O3 A) CO3^2− and NO3 − only B) O3 only C) CO2 only D) CO3^2−, NO3^−, and O3

D) CO3^2−, NO3^−, and O3

Identify the number of bonding pairs and lone pairs of electrons in O2. A) 2 bonding pairs and 6 lone pairs B) 4 bonding pair and 2 lone pairs C) 5 bonding pairs and 5 lone pairs D) 2 bonding pairs and 1 lone pair E) 2 bonding pairs and 4 lone pairs

E) 2 bonding pairs and 4 lone pairs

Choose the bond below that is least polar. A) P−Cl B) C−Cl C) C−P D) C−Te E) C−I

E) C−I

Identify the compound with covalent bonding. A) Ne B) K C) KBr D) O E) H2Se

E) H2Se

Choose the bond below that is most polar. A) H−F B) H−Cl C) H−Si D) As−H E) H−P

A) H−F

Identify the compound with polar covalent bonding. A) NH3 B) H2 C) K D) KF E) Ar

A) NH3

What kind of bond normally occurs between lithium and fluorine A) ionic B) covalent

A) ionic

Give the number of valence electrons for SBr4. A) 28 B) 34 C) 30 D) 32

B) 34

Identify the compound with ionic bonding. A) Na B) LiBr C) O D) Ne E) H2O

B) LiBr

Which of the compounds below would contain polar covalent bonds? F2, N2O, KCl A) KCl only B) N2O only C) F2 only D) both F2 and N2O

B) N2O only

Which of the following represent the Lewis structure for N? A) There is a Lewis structure for N. It has 1 unpaired electron and 1 electron pair. B) There is a Lewis structure for N. It has 3 unpaired electrons and 1 electron pair. C) There is a Lewis structure for N. It has 1 unpaired electron. D) There is a Lewis structure for N. It has 4 electron pairs. E) There is a Lewis structure for N. It has 2 unpaired electrons and 1 electron pair.

B) There is a Lewis structure for N. It has 3 unpaired electrons and 1 electron pair.

Which is more reluctant to give up an electron, lithium or fluorine? A) lithium B) fluorine

B) fluorine

Which is more willing to give up an electron, lithium or fluorine? A) fluorine B) lithium

B) lithium

If there is a large electronegativity difference between the two elements in a bond, such as normally occurs between a metal and a nonmetal, the electron from the metal is almost completely transferred to the nonmetal, and the bond is ___.

Ionic

If there is an intermediate electronegativity difference between the two elements, such as between two different nonmetals, the bond is ___ ___.

Polar covalent

If two elements with identical electronegativities form a covalent bond, they share the electrons equally, and the bond is ___ ___ or nonpolar.

Purely covalent