Chemistry I CH 8

Which of these compounds is most likely to be ionic? KF, CCl4, CS2, CO2, ICl

KF

Which of these compounds is most likely to be ionic? GaAs, SrBr2, NO2, CBr4, H2O

SrBr2

Which of these compounds is most likely to be ionic? NCl3, BaCl2, CO, SO2, SF4

BaCl2

Which of these pairs of elements would be most likely to form an ionic compounds? Cl and I, Al and K, Cl and Mg, C and S, Al and Mg

Cl and Mg

Which of the following contains ionic bonding? CO, SrF2, AL, OCl2, HCl

SrF2

Which of the following is an ionic compound? H2S, NH3, I2, KI, CCl4

KI

Which of these ionic solids would have the largest lattice energy? NaCl, NaF, CaBr2, CsI, CaCl2

CaCl2

Which of these ionic solids would have the largest lattice energy?SrO, NaF, CaBr2, BaSO4

SrO

The lattice energy for ionic crystal increases as the charge on the ions and the size of the ions .inc, inc inc, dec dec, inc dec, dec none of these

Increase, Decrease

Select the compound with the highest (i.e., most negative) lattice energy.CaS(s), BaO(s), NaI(s), LiBr(s), MgO(s)

MgO(s)

A Born-Haber cycle applied to the formation reaction of an ionic solid. Is normally used to.. calculate ionization energy,calculate electron affinity, calculate bond energy, determine the overal enthalpy change, is an application of Hess's Law

is an application of Hess's Law

Which of these compounds is most likely to be covalent?Rb2S, SrCl2, CS2, CaO, MgI2

CS2

Which of these compounds is most likely to be covalent?KF, CaCl2, SF4, Al2O3,CaSO4

SF4

Which of these compounds is most likely to be covalent?CsOH, NF3, Sr(NO3)2, CaO, LiF

NF3

Which of the following is a covalent compound?Na2O, CaCl2, Cl2O, CsCl, Al2O3

Cl2O

Which of the following is a covalent compound?BaO, IBr, Mg, LiBr, Cu

IBr

Arrange the following bonds in order of increasing bond strength.C-I < C-Br < C-Cl < C-FC-F < C-Cl < C-Br < C-IC-Br < C-I < C-Cl < C-FC-I < C-Br < C-F < C-ClNone of these orders is correct

C-I < C-Br < C-Cl < C-F

Select the strongest bond in the following group.C-S, C-O, C=C, C=N, C-F

C=N

Select the strongest bond in the following group.C-C, C-O, C=C, C=C, C-F

C=C

Which is the correct order for increasing bond strength? (1) C=C (2) C=C (3) C-C3 < 2 < 13 < 1 < 21 < 2 < 31 < 3 < 22 < 3 < 1

3 < 2 < 1

Which is the name given to the forces in a covalent compounds that exists between molecules? Intramolecular forcesIntermolecular forces Covalent forcesIonic forces Molecular forces

Intermolecular forces

What type of elements undergo ionic bonding? 2 metalsa nonmetal and a metal 2 nonmetals 2 Group 1A element2 Noble gases

a nonmetal and a meta

What type of elements undergo covalent bonding?1 metal and noble gasa nonmetal and a metal 2 nonmetals 2 Group 1A elements a actinide

2 nonmetals

In which of these substances are the atoms held together by polar covalent bonding?SrCl2, CsCl, ClF, TiF2, S8

ClF

A polar covalent bond would form in which one of these pairs of atoms?Cl---ClSi---SiCa---ClCr---BrP---Cl

P---Cl

A nonpolar covalent bond (i.e., pure covalent) would form in which of these pairs of atoms?Na---ClH---ClLi---BrSe---BrBr---Br

Br---Br

Which of these covalent bonds is the most polar (i.e., highest percent ionic character)?Al---ISi---IAl---ClSi---ClSi---P

Al---Cl

The covalent bond with the greatest polarity would form in which of these atom pairs?Br---BrS---OC---PC---OB---O

B---O

In which of these pairs of atoms would the bond be the least polar (i.e., lowest percent ionic character)?C---ClC---CC---HO---CN---C

C---C

Which of these elements has the greatest electronegativity?Na, As, Ga, Cs, Sb

As

Which of these atom is the most electronegative?Li, Cs, P, As, Ge

P

Which of these elements is the least electronegative?Sr, V, Ni, P, I

Sr

Which of the following elements is the most electronegative?S, Ru, Si, Te, Cs

S

Which of the following elements is the least electronegative?Si, Se, S, Sc, Sr

Sr

Arrange aluminum, nitrogen, phosphorus, and indium in order of increasing electronegativity.Al < In < N < PAl < In < P < NIn < Al < P < NIn < P < Al < N None of these orders is correct

In < Al < P < N

Arrange calcium, rubidium, sulfur, and arsenic in order of decreasing electronegativity.S > As > Rb > CaS > As > Ca > RbAs > S > Rb > Ca As > S > Ca > RbNone of these orders is correct

S > As > Ca > Rb

Based on electronegativity trends in the periodic table, predict which of the following compounds will have the greatest % ionic character in its bonds.H2O, LiI, CaO, RbF, HCl

RbF

The total number of bonding electrons in a molecule of formaldehyde (H2CO) is 3, 4, 6, 8,18

8

The total number of lone pairs in NCl3 is.6, 8, 9, 10, 13

10