Slide 1
COPPER
Copperis achemical element. It is aductilemetal with very
highthermal andelectrical conductivity. Pure copper is soft and
malleable.What is Copper?
Name:CopperSymbol:CuAtomic Number:29Atomic Mass:63.546
amuMelting Point:1083.0 C Boiling Point:2567.0 C Number of
Electrons:29Number of Neutrons:35Classification:Transition Metal
Crystal Structure:CubicDensity at 293 K:8.96
g/cm3Color:red/orange
AtomicStructure CopperOf
History of CopperThe oldest objects made of copper are
beads.
Tools for working with copper, made in about 5000B.C.
Bronze was one of the first alloys produced. It is primarily
copper andtin.The two metals can be melted together. The symbol for
copper, Cu, comes from the Latin wordcuprum. Cuprum is the ancient
name of the island of Cyprus. The Romans obtained much of their
copper from Cyprus.
An important physical property of copper is its color.Copper
metal is fairly soft and ductile. Ductile means capable of being
drawn into wires. Both heat and electricity pass through copper
very easily. The high electrical conductivity makes it ideal for
many electrical purposes.Physical Properties
ChemicalCopper is a moderately active metal. It dissolves in
most in alkalis. An alkali is a chemical with properties opposite
those of an acid. Sodium hydroxide, commonly found in bleach and
drain cleaners like Drano, is an example of an alkali.
Properties
Reaction with OxygenAn important chemical property of copper is
the way it reacts withoxygen.In moist air, it combines with water
and carbon dioxide. The product of this reaction is called hydrated
copper carbonate.
The colour of the Statue of Liberty
The Statue of Liberty is covered with copper plates. When it was
new, Lady Liberty was copper in colour. Over time, the plates
slowly turned green. This green substances is formed due to the
reaction of copper with carbon dioxide and moisture present in the
atmosphere.
PastPresent
Uses of CopperElectrical wiringElectric clocksStovesPortable CD
playersTransmission wires that carry electricityA large skyscraper
Older telephone lines Computers depend on circuit boards imprinted
with minute copper pathways.
Compounds
CompoundsBasic copper acetate (Cu2O(C2H3O2)2): kills insects and
kills fungi.A number of copper compounds are used as
pesticides:Copper chromate (CuCrO4 2CuO): fungicide for the
treatment of seeds.Copper methane arsenate (CuCH3AsO3): kills
algae.Copper-8-quinolinolate (Cu(C9H6ON)2): protects fabric from
mildew.Copper oxalate (CuC2O4): seed coating to repel rats.Tribasic
copper sulfate (CuSO4 3Cu(OH)2): used as a spray or dust on
crops.
Health Effects
Copper is an essential micronutrient for both plants and
animals. A micronutrient is an element needed in minute amounts to
maintain good health in an organism. A healthy human has more than
2 milligrams of copper for every kilogram of body weight.
Thank You
By, Tushara.M
