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Conductivity. Yes. No. In the molten or aqueous phase. In the solid phase. Ionic Solids Characteristics. Formed from a bond between a metal and nonmetal. Ionic Solids. Strong Electrostatic Attractions. Rigid crystalline structure. Relatively High

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ionic solids characteristics

Conductivity

Yes

No

In

the molten

or aqueous

phase

In

the solid

phase

Ionic Solids Characteristics

Formed from

a bond

between

a metal

and

nonmetal

Ionic Solids

Strong

Electrostatic

Attractions

Rigid

crystalline

structure

Relatively High

Melting Point

Hard,

brittle

solids

the first couple
The First Couple
  • # 1) Energy is released when bonds are formed. Energy is absorbed when bonds are broken.
  • #2) As a bond forms the PE decreases.
  • #3) Energy is released -> stability increases
  • #4) Two atoms combine to form a molecule, bond formed, energy is released
5 which electron dot diagram represents h 2

H

H

H

H

#5 Which electron-dot diagram represents H2?

Both hydrogen’s will equally share their valence electron

9 in which compound do the atoms have the greatest difference in electronegativity
#9) In which compound do the atoms have the greatest difference in electronegativity?
  • NaBr

|0.9 – 3.0| = 2.1

  • KF

|0.8 – 4.0| = 3.2

  • AlCl3

|1.6 – 3.2| = 1.6

  • LiI

|1.0 – 2.7| = 1.7

slide5
#13) Given the reaction: M + 2H2O -> M(OH)2 + H2The metal represented by M is most likely a metal from Group

The subscript of 2 on the hydroxide came from the charge on the metal (M).

M(OH)2

M+2(OH)-1

So the Metal (M) must be from Group 2 because of its +2 oxidation state!

slide6

#16) Element X has an electron configuration of 2-8-3. This element will combine with the phosphate ion to form a compound with the formula

3 Valence e-’s means that is will have an oxidation state of +3

X+3(PO4)-3

From Table E: phosphate has a -3

Criss

Cross w/out

charges

X3(PO4)3

3

3

Reduce

to

Lowest

Ratio

X(PO4)

slide7

H

H

H

H

#33

a.

b.

c.

H2 is nonpolar and H2O is polar, like dissolves like, therefore H2 will not dissolve in H2O.

1Mg +1H2SO41H2+1MgSO4

slide8
#34

+

H

N

H

H

a. b.

N

H

H

H

H

slide9
#35

H

Cl

a.

b.

c. H-Cl is polar, water is polar; like dissolves like

H

Cl

+

slide10
#36

N

N

a.

OR

b. N2 is very stable, unreactive because of triple bond (a lot of energy was released when this bond was formed).

N

N

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