________ released from the extinguisher into the environment at 1 atm immediately changes to a vapor.
New cards
2
structures of crystalline solids
The ________ are most commonly determined by X- ray diffraction.
New cards
3
mixture of elements
Alloy**: a substance that contains a(n) ________ and has metallic properties.
New cards
4
Diffraction
________ is due to constructive interference when the waves of parallel beams are in phase and to destructive interference when the waves are out of phase.
New cards
5
L iquids
________ exhibit many characteristics that help us understand their nature.
New cards
6
Metals
________ are characterized by high thermal and electrical conductivity, malleability, and ductility.
New cards
7
external pressure
The melting point of ice decreases as the ________ increase.
New cards
8
Electrons
________ must be in singly occupied molecular orbitals to conduct a current.
New cards
9
alcohols methanol
The ________ and ethanol have much higher boiling points than would be expected from their molar masses because of the polar O- H bonds in these molecules, which produce hydrogen bonding.
New cards
10
Table sugar
________, on the other hand, is composed of neutral molecules that are dispersed throughout the water when the solid dissolves.
New cards
11
New cards
12
New cards
13
New cards
14
New cards
15
New cards
16
New cards
17
New cards
18
New cards
19
New cards
20
New cards
21
New cards
22
New cards
23
New cards
24
New cards
25
New cards
26
ceramic contains
A(n) ________ two phases: minute crystals of silicates that are suspended in glassy cement.
New cards
27
molecular orbitals
The existence of empty ________ close in energy to filled ________ explains the thermal and electrical conductivity of metal crystals.
New cards
28
Octahedral holes
________ are formed between two sets of three spheres in adjoining layers of the closest packed structures.
New cards
29
Molecular complexity
________ leads to higher viscosity because very large molecules can become entangled with each other.
New cards
30
Ceramics
________ seem an obvious choice for constructing jet and automobile engines in which the greatest fuel efficiencies are possible at very high temperatures.
New cards
31
Ionic solids
________ such as NaCl and NaF have very high melting points and enthalpies of fusion because of the strong ionic forces in these solids.
New cards
32
Metals
________ conduct electricity and heat very efficiently because of the availability of highly mobile electrons.
New cards
33
vapor pressures
The melting and boiling points for a substance are determined by the ________ of the solid and liquid states.
New cards
34
phase diagram
A(n) ________ is a convenient way of representing the phases of a substance as a function of temperature and pressure.
New cards
35
Hydrogen bonding
________ is also important in organic molecules.
New cards
36
Ionic solids
________ are stable, high- melting substances held together by the strong electrostatic forces that exist between oppositely charged ions.
Studied by 0 people
