introduction to chemistry
DESCRIPTION
A Power Point Presentation on Introductory Chemistry. To motivate new students of Chemistry. To help students appreciate the importance of Chemicals in everyday life. Done by Bro. Oh Teik Bin, Lower Perak Buddhist Association, Teluk Intan, Malaysia.TRANSCRIPT
Introduction To Chemistry
A Motivational Lesson
CHEMISTRY
ELEMENT,
COMPOUND
AND
MIXTURE
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
ELEMENT
Metal Non-Metal
(l) (s) (g) (l) (s)
(g) – gas (l) – liquid (s) - solid
Examples of Metals
( Sodium )
Na
Use :
Sodium Lamp
Copper CuUse : Electric Conductor
Calcium CaUse : Calcium ions needed to form bones
and teeth
Aluminium AlUse: Making of cooking pots and pans
Gold ; Aurum AuUse : Jewelry
Iron; Ferum FeUse : Construction of buildings
and bridges
Lead PbUses : Water pipes
Pipes for wiring
Magnesium MgUse : Crackers and Fireworks
Platinum PtUse: Jewelry
Potassium KUse : Potassium salts
- agricultural fertilizers
Silver AgUse : Jewelry
Tin SnUse : Making containers
Zinc ZnUses : Dry cells;
Roofing for houses
Mercury HgUse : In Thermometers
Examples of Non-Metals
Chlorine ClUse : Killing germs in water
supply
Argon ArUse : Lighting Bulbs
Bromine BrUse : Photography
Boron BUse : Making
Medicine in pharmacy
Helium HeUse : Filling balloons
Carbon C Diamond & Graphite
Hydrogen HUse: Fuel
Iodine I
Use : Antiseptic
Neon NeUse : Neon Lights
Nitrogen NUse : Liquid Nitrogen –
Refrigeration Coolant
Oxygen O
Use : Gas for Breathing
Phosphorus P
Use : Matches
Silicon Si
Use : Computer CPU
Sulphur S
Use : Manufacture of
Sulphuric Acid
What is a Compound ?
A Chemical Consists of 2 or
more elements chemically combined
Chemical Bond between the particles
Examples of Compounds
Ammonium ChlorideUse : Dry Batteries
Constituents : H , N , Cl
Glucose
Use : Carbohydrates
Constituents : H , C , O
Sodium Chloride
Use : Flavor for Food
Constituents : Na , Cl
Calcium carbonate
Use : Building material
Constituents : Ca , C, O
Sulphuric acid
Use : Car Accumulator
Constituents : H , S , O
Urea
Use : Nitrogeneous Fetilizer
Constituents : C , H , O , N
Copper (II) sulphate
Use: FungicideConstituents : Cu , S , O , H
Potassium nitrate
Use : Agricultural Fertilizers
Constituents : K , N , O
Ethanoic acid
Use : Vinegar
Constituents : C , H , O
Trichloromethane (Chloroform)
Use : Anaesthetic
Cost : C , H , Cl
What is a Mixture ? Substance consisting of 2
or more substances physically combined together
Components : Elements or/and compounds
Components can be separated by physical means
Examples of Mixtures
Air– Oxygen, Nitrogen, Carbon dioxide, water
vapor etc
Soil
Constituents : Humus, sand,
air, water, minerals etc.
Milk
Components : Lactose, water, proteins, vitamins, minerals etc
The EndThe End
May you learn Chemistry May you learn Chemistry happily and effectively !happily and effectively !
With Metta,With Metta,Bro. Oh Teik BinBro. Oh Teik Bin