Solids

Question 1

Viscosity of solids

Answer 1

Infinite

Question 2

Amorphous solids has _____ MP/BP

Answer 2

Long range

Question 3

Another name for amorphous solids

Answer 3

Supercooled liquids

Question 4

Examples of amorphous solids

Answer 4

Plastic, wood, glass, rubber, gemstone, concrete, polymer

Question 5

Crystalline solids have particles arranged

Answer 5

In 3D

Question 6

Crystalline solids cleavage plane

Answer 6

Proper (anisotropic)

Question 7

Crystalline solids other name

Answer 7

True solids

Question 8

Crystalline solids examples

Answer 8

NaCl, KI, diamond, graphite, ice, dry ice, CaCO3, MgO, Fe, Cu, K, Mg, Sr

Question 9

How many elements of symmetry

Answer 9

23

Question 10

Cubical solids

Answer 10

NaCl, diamond, MgO, NaF

Question 11

Hexagonal solids

Answer 11

Graphite, Water (ice), ZnO, CdS

Question 12

Orthorhombic solids

Answer 12

KNO3, AgNO3

Question 13

Isomorphs are

Answer 13

Solids that have the same structure (cubical etc)
(So NaCl and diamonds are isomorphs)

Question 14

Polymorph is

Answer 14

One solid that has many structures
(KNO3 and AgNO3 can be orthorhombic and rhombahedral)
(CaCO3 can be trigonal and orthorhombic)

Question 15

Polymorphs have

Answer 15

Similar chemical properties but different physical properties

Question 16

Isomorphs have

Answer 16

Same structure, same ratio of combined elements
Different physical and chemical structures

Question 17

Allotrophy is

Answer 17

When one element can exist as different forms
(C = diamond / graphite)
(S = Sd / Sp)
(Sn = Sn white / Sn grey)

Question 18

Allotrophy has

Answer 18

Same chemical properties
Different physical properties

Question 19

Transition temp is

Answer 19

Temp at which 2 crystalline forms can coexist

Question 20

Transition temp of Sn grey / Sn white

Answer 20

13.2º

Question 21

Transition temp of Sa / Sp

Answer 21

95.5º

Question 22

Transition temp of KNO3 (orhtorhombic) / KNO3 (rhombohedral)

Answer 22

128.6º

Question 23

Growth of crystals (How to get large size)

Answer 23

Slow growth = Large size
If vapor used = Large

Question 24

Impurities in crystalline

Answer 24

Pure NaCl = cubical
Small impurities = Flat crystals
5-10% urea = needle shaped crystals

Question 25

Examples of molecular solids are

Answer 25

CO2 (solid) (dry ice) / sugar crystals / naphthalene / urea / Cl2 / O2 (s) / N2 (s) / Br2 (s)

Question 26

Simple cube coordination number

Answer 26

6

Question 27

Body centered cube coordination number

Answer 27

8

Question 28

Face centered cube coordinate number

Answer 28

12

Question 29

Low temperature = ______ Stable

Answer 29

More

Question 30

Cubic crystallographic element

Answer 30

a = b = c = equal length
a = ß = ¥ = 90º

Question 31

Trigonal crystallographic elements

Answer 31

a = b ≠ c
a = ß = ¥ = 90º

Question 32

Hexagonal crystallographic elements

Answer 32

a = b ≠ c
a = ß = 90º ¥ = 120º

Question 33

Rhombohedral crystallographic elements

Answer 33

a = b = c
a = ß = ¥ ≠ 90º

Question 34

Orthorhombic crystallographic elements

Answer 34

a ≠ b ≠ c
a = ß = ¥ = 90º

Question 35

Monoclinic crystallographic elements

Answer 35

a ≠ b ≠ c
a = ¥ = 90º ß ≠ 90º

Question 36

Triclinic crystallographic elements

Answer 36

a ≠ b ≠ c
a ≠ ß ≠¥