chemistry - elements, terminologies and more
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Introduction To Chemistry
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CHEMISTRY
ELEMENT,
COMPOUND
AND
MIXTURE
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What is an element ?
Element
A chemical substance
Simplest substance
Cannot be decomposed
to a simpler substance
Built up from one type
of atoms only
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ELEMENT
MetalN
on-Metal
(l) (s) (g) (l) (s)
(g) gas (l) liquid (s) - solid
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Examples ofMetals
(Sodium )
Na
Use :
Sodium Lamp
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Copper CuUse : Electric Conductor
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Calcium CaUse : Calcium ions needed to form bonesand teeth
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Aluminium AlUse: Makingof cookingpotsand pans
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Iron; Ferum Fe
Use : Construction of buildings
and bridges
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Magnesium MgUse : Crackersand Fireworks
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Platinum Pt
Use: Jewelry
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Potassium K
Use : Potassium salts
- agricultural fertilizers
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Silver Ag
Use : Jewelry
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Tin Sn
Use : Makingcontainers
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Zinc Zn
Uses : Dry cells;
Roofingfor houses
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Mercury Hg
Use : In Thermometers
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Examples of Non-Metals
Chlorine ClUse : Killinggerms in water
supply
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Argon Ar
Use : Lighting Bulbs
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Bromine Br
Use : Photography
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Boron B
Use : MakingMedicine in pharmacy
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Helium He
Use : Fillingballoons
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Carbon C
Diamond & Graphite
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Hydrogen H
Use: Fuel
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Neon Ne
Use : Neon Lights
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Nitrogen N
Use : Liquid Nitrogen Refrigeration Coolant
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Oxygen O
Use : Gas for Breathing
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Silicon SiUse : Computer CPU
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Sulphur S
Use : Manufacture of
Sulphuric Acid
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What is a Compound ?
AChemical
Consists of 2 or
more elementschemically combined
Chemical Bondbetween the particles
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Examples ofCompounds
Ammonium Chloride
Use : Dry Batteries
Constituents : H , N , Cl
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Glucose
Use : Carbohydrates
Constituents: H , C , O
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Sodium Chloride
Use : Flavor for Food
Constituents: Na , Cl
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Calcium carbonate
Use : Building material
Constituents : Ca , C, O
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Sulphuric acid
Use : Car Accumulator
Constituents : H , S , O
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Urea
Use : Nitrogeneous Fetilizer
Constituents : C , H , O , N
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Copper(II) sulphate
Use: Fungicide
Constituents : Cu , S , O , H
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Potassium nitrate
Use : Agricultural Fertilizers
Constituents : K , N , O
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Ethanoic acid
Use : Vinegar
Constituents : C , H , O
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Trichloromethane (Chloroform)
Use : Anaesthetic
Cost: C , H , Cl
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What is a Mixture ?
Substance consisting of 2or more substancesphysically combined
together Components : Elements
or/and compounds
Components can beseparated by physicalmeans
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Examples of Mixtures
AirOxygen, Nitrogen,
Carbon dioxide, water
vapor etc
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Soil
Constituents : Humus, sand,
air, water, minerals etc.
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Milk
Components : Lactose, water,
proteins, vitamins, minerals etc
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