2. ALLOTROPES:
• Allotrope is the ability of an
element to appear in different
forms.
• Eg: Diamond and Graphite.
• Though both are completely
made of carbon. They have
different arrangement of atoms.
POLYMORPHISM:
• Polymorphism is the ability of a
solid compound to exist in
different crystal structure.
• Eg: Aragonite (orthorhombic)
and Calcite (trigonal).
• Though both are calcium
carbonate (CaCO3)
3. ALLOYS:
• Alloy is a mixture TWO or more
METALS WITH OTHER
ELEMENTS.
• Eg: stainless steel
• CLASSIFICATION: PURE METAL,
SOLID SOLUTION,
INTERMEDIATE PHASE
COMPOSITE
• Composite is a mixture of 2 or
more compounds.
• The mixture need not to have a
metal.
• THE MIXTURE CAN BE FIBRE
AND POLYMER.
• EG: CARBON REINFORCED FIBRE,
4. SOLID SOLUTION:
• SOLID SOLUTION IS A TYPE OF
solution, where solid is dissolved
in solid
• IT is a phase where two or more
elements are completely soluble
into a single crystal structure
• EG: TIN DISSOLVED IN COPPER
(BRONZE)
PHASE:
• COMPOUND HAVING SAME
CHEMICAL FORMULA BUT
DIFFERENT PHYSICAL STRUCTURE.
• A compound or alloy can have
different phase
• EG:WATER AND ICE , AUSTENITE
AND FERRITE
