chapter 12 Q&A

A bond between atoms having a (small/large) difference in the electronegetivity will be ionic.

Large

What does it mean to say that a bond is polar? Give two examples of molecules with polar bonds. Indicate in your examples the direction of the polarity.

Unequal sharing of electrons between atoms in a molecule HF

In each of the following groups, which element is the most electronegetive? Which is the least electronegetivite? a.Cs,Ba,At b.Ba,Sr,Ra c.O,Rb,Mg

a. At and Cs b.Sr and Ra and Ba is tied least c. O and Rb

On the basis of the electronegitivity values given in Fig.12.3,Indicate wheter each of the following bonds would be expected to be covalent, Polar covalent, or ionic a.O-O b.Al-O c.B-O

a.Covalent b.Ionic c. polar covalent

In each of the following groups, which element is the most electronegetive? Which is the least electronegetivite? a. K,Na,H b.F,Br,Na c.B,N,F

a.H and least electro is K b.F and Na c.F and B

On the basis of the eletronegativity values given indicate which is the more polar bond on each of the following pairs. a.H-F or H-Cl b.H-Cl or H-I c.H-Br or H-Cl d.H-I or H-Br

a.H-F b.H-Cl c.H-Cl d.H-Br

On the basis of the eletronegativity values given indicate which is the more polar bond on each of the following pairs. a.O-Cl- or O-Br b.N-O or N-F c.P-S or P-O d.H-O or H-N

a.O-Br b.N-F c.P-O d.H-O

On the basis of the electronegitivity values given in Fig.12.3,Indicate wheter each of the following bonds would be expected to be covalent, Polar covalent, or ionic a.S-S b.S-H c.S-K

a.covalent b.Polar covalent c.ionic

Which of the following molecules contain polar covalent bonds ? a. H2O b. CO c. F2 d. N2

a.polar covalent bond 3.5(O)-2.1(H)=1.4 b.polar covalent bond c.covalent d.covalent

Which of the following molecules contain polar covalent bonds? a.P4 b.O2 c.O3 d.HF

d.polar covalent

What is a covalent bond?

electrons are shared equally betweem identical atoms

What is a chemical bond?

the force that holds two atoms together and makes them function as a unit

What sorts of elements react to form ionic compounds?

A metal and nonmetal react together. Electrons are transferred to from postive and negetive ions

What does the bond energy of a chemical bond represent?

Bond energy of a chemical bond represents the energy required to break that particular bond.

What factor determines the relative level of polarity of a polar covalent bond?

Difference between electronegativity Top right corner is the most electronegative spot and the it increase as you go up and to the right

The relative ability of an atom in a molecule to attract electrons to itself called the atom's _________

Electronegetivy

Compare and contrast the bonding found in the H2(g) and HF(g) molecules with that found in NaF

H2 has a pure covalent bond since they are identical atoms HF result in a polar covalent bond NaF is an ionic bond

Describe the type of bonding that exists in the CL2(g) molecule. How does this type of bonding differ from that found in the HCl(g) molecule?How is it similar?

Its purely covelent. Its different because they are equally attracted simultaneously.polar covalent bond is what HCl