General Flashcards
1
Q
Physical properties of ionic compounds (4)
A
- solids with high mp and bp
- usually soluble in water, insoluble in organic solvents
- good conductors of electricity in molten/aq state but not in solid
- hard and brittle
2
Q
Insoluble ionic compounds
A
Lead (II) chloride
Silver chloride
3
Q
Organic solvents (3)
A
- carbon tetrachloride (CCl4)
- hexane (C6H14)
- ethanol (C2H5OH)
4
Q
Strength definition
A
Ability to carry weights
5
Q
Brittleness definition
A
Breaking when hit by a hammer
6
Q
Physical properties of covalent compounds (3)
A
- low mp and bp, usually gases or liquids at rt
- do not conduct electricity
- insoluble in water but soluble in organic solvents
7
Q
Dimer definition
A
2 molecules joined together
8
Q
Properties of metals (6)
A
- high mp& bp
- conducts electricity in solid and molten state
- good conductor of heat
- hard (can vary)
- malleable and ductile
- generally insoluble in all solvents
9
Q
Substances with giant molecular structure
A
- diamond
- graphite
- siliocn
- silicon dioxide
- group 14 elements
10
Q
Exception to group 14 elements with giant molecular structure
A
Diamond and graogite
11
Q
Alltrope definition
A
Diff forms of same element with different striuctures
12
Q
Appearance of diamond
A
Colourless, transparent crystal
13
Q
Hardness of diamond
A
Hardest natural substance
14
Q
Density of diamond
A
3.5g/cm^3
15
Q
Electrical conductivity of diamond
A
No
