The Periodic Table Groups
A group (also known as a family) is a vertical column in the periodic table of elements.The alkali metals – Group I - Very reactive soft metals. - Increases in reactivity down the group. - ...
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A group (also known as a family) is a vertical column in the periodic table of elements.The alkali metals – Group I - Very reactive soft metals. - Increases in reactivity down the group. - ...
Organic chemistry is the chemistry of carbon containing compounds. A hydrocarbon is a substance that contains only carbon and hydrogen. There are three main hydrocarbons on the course – al...
Tetrahedral carbon compounds In saturated organic compounds, all of the carbon atoms are tetrahedral.Chloroalkanes - A chloroalkane is an alkane in which one or more hydrogen atoms are rep...
Weather - El Tiempo – The Weather - El Clima – The Climate - Hace frío – It’s cold - Hace calor – It’s hot - Hace sol – It’s sunny - Hace viento – It’s windy - Está lloviendo – It’s raining...
Ethyne gas is prepared by the reaction of water with calcium carbide (CaC2). Ethyne gas is a colourless gas.Main Chemicals required - Calcium Carbide (CaC2) [also known as calcium dicarbide...
The Atom - John Dalton – proposed a theory about atoms in 1808. - William Crookes – investigated what happens when electricity passed through gases. - J.J Thomson – discovered the electron....
Just how small are atoms? And what’s inside them? The answers turn out to be astounding, even for those who think they know. This fast-paced animation uses spectacular metaphors (imagine a b...
Ethene gas is prepared by dehydrating ethanol (drug found in alcoholic drinks). Ethene is a colourless gas with a sweet smell. It is a insoluble in water but can dissolve in organic solvents...
Water treatment plants convert the raw untreated water to consumable water that is available at your home. The stages of water treatment: 1. Sedimentation: Large particles are screened out ...
Hard water is any water that forms a scum with soap. Soft water forms lather with soap. Hardness is caused by dissolved calcium and magnesium icons (Ca2+ and Mg2+).Temporary hardness - Tem...