Ionic and Metallic Bonding/covalent bonding

Question 0

Reason for ductility in metal

Answer 0

The sea of electrons enables the cations to move past each other when pressure is applied

Question 1

Reason for conductivity in metal

Answer 1

Electrons can flow freely

Question 2

Reason for malleability

Answer 2

The sea of electrons enables the cations to be pushed closer together when hit.

Question 3

Four properties that make steel an important alloy

Answer 3

Corrosion resistance
Durability
Hardness
Toughness

Question 4

Elements in sterling silver

Answer 4

Silver and copper

Question 5

Elements in brass

Answer 5

Copper and silver

Question 6

Elements in stainless steel

Answer 6

Iron, chromium, nickel, and carbon

Question 7

Elements in cast iron

Answer 7

Iron and carbon

Question 8

Interstitial alloys

Answer 8

Alloys have smaller atoms that fit into the spaces of the larger atoms

Question 9

Substitutional alloys

Answer 9

Alloys have component atoms that are roughly equal in size

Question 10

Covalent network solids

Answer 10

Melting point: very high
Conductivity: no
Solubility: not soluble in water, alcohol or heptane
Type of inter particle force: covalent bonds
Unknown substance: diamond

Question 11

Ionic solids

Answer 11

Melting point: about 800 degrees Celsius
Conductivity: no, not in solid state
Solubility: soluble in water, but not in heptane or alcohol
Type of inter particle force: ionic bonds
Unknown substance: salt

Question 12

Polar covalent

Answer 12

Melting point: low-moderate
Conductivity: no
Solubility: soluble in water and ethanol; not soluble in heptane
Type of inter particle force: London dispersion, dipole-dipole, hydrogen bonding
Unknown substance: sugar

Question 13

Non polar covalent solids

Answer 13

Melting point: low
Conductivity: no
Solubility: not soluble in water, soluble in heptane and alcohol
Type of inter particle force: London dispersion
Unknown substance: nonane

Question 14

Metallic solids

Answer 14

Melting point: depends on how big the sea of electrons is
Conductivity:
Solubility: not soluble in water, alcohol or heptane
Type of inter particle force:
Unknown substance: zinc, aluminum, sodium

Question 15

Body centered cubic structure
Face centered cubic structure
Hexagonal closed packed

Answer 15

Has 8 neighbors
Has 12 neighbors
Has 12 neighbors

Question 16

What does a coordination number tell you?

Answer 16

It is the number of ions of opposite charge that surround an ion in a crystal.

Question 17

Which of the following is the weakest? Strongest?
Hydrogen bond
Polar covalent bond
Dipole interaction
Ionic bond

Answer 17

Dipole interaction (though overall weakest is London dispersion)
Hydrogen bonding