Skip to page content |

Tiscali Quicklinks. Please visit our Accessibility Page for a list of the Access Keys you can use to find your way around the site, skip directly to the main navigation, to the page content, or to more links within reference.

Advertisement starts

Advertisement ends

Content Starts Here

reaction

encyclopaedia header
Encyclopaedia Search
Click a letter for the index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Or search the encyclopaedia:
 
 
 
all results tagged with the © symbol denotes content that is relevant to the national curriculum

Reaction

collision theory - Click to enlarge rate of reaction - Click to enlarge

Click images to enlarge

In chemistry, the coming together, or interaction, of two or more atoms, ions, or molecules with the result that a chemical change takes place and a new substance is formed, with a different chemical composition. The nature of the reaction is described by a chemical equation. For example, in the chemical reaction that occurs when magnesium burns in oxygen, a new substance, magnesium oxide is made:

2Mg(s) + O2(g) ® 2MgO(s)

Chemical equations show the reactants and products of a chemical reaction by using chemical symbols and formulae. State symbols and the energy symbol (ΔH) can be used to show whether reactants and products are solids (s), liquids (l), gases (g), or are in solution (aq); and whether energy has been released or absorbed during the reaction.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
Back
 

Advertisement starts

Advertisement ends



acid
acid rain
activation energy
alkali
aluminium
ammonia
base
bauxite
biotechnology
blast furnace
brewing
carbonate
catalyst
chemical equation
chemical equilibrium
collision theory
combustion
competition reaction
conservation of mass
contact process
corrosion (chemistry)
decomposition
denaturation
displacement reaction
ductile
electric charge
electrolysis (chemistry)
electrolyte
endothermic reaction
energy of reaction
energy transfer
enzyme
equation (chemistry)
equation, word
exothermic reaction
fossil fuel
Haber process
haematite
hydroxonium ion
indicator
iron ore
kinetic theory
lime (chemical)
litmus
malleability
metal
metallurgy
mineral extraction
neutral solution
neutralization
nitric acid
ore
oxidation (chemistry)
particle theory
pH
photosynthesis
precipitation (chemistry)
rate of reaction
reaction
reactivity series
redox reaction
reduction
respiration
reversible reaction
rust (chemistry)
sacrificial metal
salt
slag
smelting
smoke
sonorous
steel
sulphuric acid
universal indicator
yield (chemistry)

Related Links

Congo, Republic of Flag
Congo, Republic of Flag The flag uses the pan-African colours in a striking design. Effective date: 10 June 1991. >>

Advertorial

AdvertorialFind out how to buy the things you've always wanted and sell the things you don't on ebay.

Advertisement starts

Advertisement ends

More Links Within This Section

-->
encylopaedia

Page Footer

print now Print now send to a friend Send to a friend related articles Related articles related products Related products

Check shares

Check shares
Look up latest prices
more...

Best Loans

Best Loans
Search for the best rate.
more...

Dating

Dating
Find the love of your life
more...

TV guide

TV Guide
What's on the box?
more...
| Advertise | Press | Work at Tiscali | Site Map | Service Status | Help | Contact Us
© Tiscali 2008
IT | NET

Access keys


You will need to use different key combinations in order to use access keys depending on your internet browser, find out which on our accessibility page.
  • (0) Navigate to Accessibility page.
  • (1) Navigate to Home page.
  • (2) Navigate to My email.
  • (3) Navigate to My Account.
  • (4) Navigate to Site Map page.
  • (5) Navigate to Contact us page.
  • (6) Navigate to Members channel.
  • (7) Navigate to Services channel.
  • (8) Navigate to News & Info channel.
  • (9) Navigate to Entertainment channel.
  • ([) Skip down to the Primary navigation block.
  • (]) Skip down to the more links within this section block.
  • (=) Bypass all navigation and jump to the content.