Saturday, 22 December 2012

Kinetic Theory .~.


States of Matter and Kinetic Theory
-Matter is any substance that occupies space and has mass.
-Matter is made up of particles (atoms, molecules or ions)
-It exists in three states: solid, liquid and gas

The properties and differences between the three states
Property
Solid
Liquid
Gas
Shape
fixed
Not fixed
Not fixed
Volume
fixed
fixed
Not fixed
Compressibility (can it be compressed?)
Density (relative)
High
Medium
Low

Matter can be converted from one state to another. The processes associated with changes of state are shown below

Gas Condensation Liquid
Gas Evaporation Liquid
Solid Freezing Liquid
Solid Melting Liquid
Gas  Solidification Solid
Gas Sublimation Solid
The Kinetic Theory explains the changes that occur when matter changes state.. Generally, heating causes particles to gain kinetic energy and move about rapidly. The movement can be rotational, vibrational or even translational in nature. 

Thursday, 26 July 2012

DIFFUSION :o

Diffusion has a few meanings.
Here's a picture that might help you guys to understand Diffusion better ^^
Reference : http://www.biology-online.org/dictionary/Diffusion
Picture Credits go to owner :)





Monday, 16 July 2012

Separation Techniques (:

So there are basically FOUR separation techniques. The 4 are Crystallization, Chromatography, Filtration and Distillation (: Posting the notes I took in class x)


      Crystallization 

  • Making a substance PURE
  • Solution should be Saturated [Definition of "Saturated Solution": Solution in which no more solute will dissolve. ]
  • Change of a state of substance from LIQUID to SOLID
      Chromatography

  • To separate a mixture
  • To find out the number of components
  • Depends on the solubility of compounds/substances in a solvent
     Filtration

  • Differentiate between differently-sized substances 
  • The process of separating suspended particles from the fluid through a porous material in which the fluid can pass while the suspended particles are retained 
  • Depends on the size of the substances. 
    Distillation
  • The separation of a liquid mixture into its components on the basis of differences in boiling points. 
  • Depends on the boiling point of substances. 


eLements, compounds and mixtures (:

I know I havent posted for a suuuuper long time x( Sorry :P I'll have one last post about elements, compounds and mixtures (: just to clarify what these 3 are :D [over usage of emoticons sorry :/ ] After this, I'll go onto the chapter of Separation Techniques~ ^^


ELEMENTS - A substance consisting of atoms which all have the same number of protons - i.e. the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down further using chemical methods. Elements can only be changed into other elements using nuclear methods.


COMPOUNDS - A substance formed by the reaction of two or more chemical elements. The elements in a compound are present in fixed ratios. For example pure water is a compound made from two elements - hydrogen and oxygen. The fixed ratio of hydrogen to oxygen in water is 2:1. Each molecule of water contains two hydrogen atoms bonded to a single oxygen atom. Compounds can be decomposed chemically into their constituent elements.


MIXTURES - Composed of two or more substances, but each keeps its original properties. 


All Clear? :)

Reference : http://www.chemicool.com/ 


Sunday, 1 July 2012

Yet another list of metals and non-metals in the Periodic Table ^_^

Ahhh I found another list x)


NON METALS:

Argon, Astatine, Bromine, Carbon, Chlorine, Fluorine, Helium, Hydrogen, Iodine, Krypton, Neon, Nitrogen, Oxygen, Phosphorus, Radon, Selenium, Sulfur and Xenon are the non-metal elements within the periodic table. Non-metals are either liquid or gas at room temperature, they have low electrical conductivity and have high melting and boiling points. Non-metals oxides are acidic.

METALS:

Hydrogen usually a metal but considered as nonmetal 
Lithium 
Sodium 
Potassium 
Rubidium 
Cesium 
Francium
Beryllium 
Magnesium 
Calcium 
Strontium 
Barium 
Radium 
Aluminum 
Gallium 
Indium 
Tin 
Thallium 
Lead 
Bismuth 
Element 113 - Ununtrium - will probably be a basic metal. 
Element 114 - Ununquadium - will probably be a basic metal. 
Element 115 - Ununpentium - will probably be a basic metal. 
Element 116 - Ununhexium - will probably be a basic metal. 
Scandium 
Titanium 
Vanadium 
Chromium 
Manganese 
Iron 
Cobalt 
Nickel 
Copper 
Zinc 
Yttrium 
Zirconium 
Niobium 
Molybdenum 
Technetium 
Ruthenium 
Rhodium 
Palladium 
Silver 
Cadmium 
Lanthanum 
Hafnium 
Tantalum 
Tungsten 
Rhenium 
Osmium 
Iridium 
Platinum 
Gold 
Mercury 
Actinium 
Rutherfordium 
Dubnium 
Seaborgium 
Bohrium 
Hassium 
Meitnerium 
Darmstadtium 
Roentgenium 
Element 112 - Ununbium - Presumably will be a transition metal. 
Cerium 
Praseodymium 
Neodymium 
Promethium 
Samarium 
Europium 
Gadolinium 
Terbium 
Dysprosium 
Holmium 
Erbium 
Thulium 
Ytterbium 
Lutetium 
Thorium 
Protactinium 
Uranium 
Neptunium 
Plutonium 
Americium 
Curium 
Berkelium 
Californium 
Einsteinium 
Fermium 
Mendelevium 
Nobelium 
Lawrencium


Referance : http://wiki.answers.com/Q/List_of_metals_and_non-metals#ixzz1zRApZSLo

Metals, Non-Metals and Metalloids in the Periodic Table

Metals in the Periodic Table


Hydrogen in its metallic state (usually considered a nonmetal)
Lithium
Sodium
Potassium
Rubidium
Cesium
Francium
Beryllium
Magnesium
Calcium
Strontium
Barium
Radium
Aluminum
Gallium
Indium
Tin
Thallium
Lead
Bismuth
Element 113 - Ununtrium - will probably be a basic metal.
Element 114 - Ununquadium - will probably be a basic metal.
Element 115 - Ununpentium - will probably be a basic metal.
Element 116 - Ununhexium - will probably be a basic metal.
Scandium
Titanium
Vanadium
Chromium
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Yttrium
Zirconium
Niobium
Molybdenum
Technetium
Ruthenium
Rhodium
Palladium
Silver
Cadmium
Lanthanum
Hafnium
Tantalum
Tungsten
Rhenium
Osmium
Iridium
Platinum
Gold
Mercury
Actinium
Rutherfordium
Dubnium
Seaborgium
Bohrium
Hassium
Meitnerium
Darmstadtium
Roentgenium
Element 112 - Ununbium - Presumably will be a transition metal.
Cerium
Praseodymium
Neodymium
Promethium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Thorium
Protactinium
Uranium
Neptunium
Plutonium
Americium
Curium
Berkelium
Californium
Einsteinium
Fermium
Mendelevium
Nobelium
Lawrencium


Non Metals in the Periodic Table

Hydrogen 
Carbon 
Nitrogen 
Oxygen 
Phosphorus 
Sulfur 
Selenium

Metalloids in the Periodic table

Boron
Silicon
Germanium
Arsenic
Antimony
Tellurium
Polonium



Groups in the Periodic Table

http://chemistry.about.com/library/weekly/blgroups.htm <<< This link has all the various groups in the Periodic Table ^^ You can check it out if you're curious~ ^^