chemistry

• isotopes are atoms with the same number of protons but different numbers of neutrons
• a compound is made up of two or more elements chemically combined together
• In order for particles to react is that they should collide with sufficient energy
• Activation energy is the minimum amount of energy needed for a reaction to occur.
• There are more particles to collide at the beginning of reaction
• Reversible reaction is a reaction where the products can also react to from reactants
• Exothermic reaction is when it releases energy to the surrounding
• Endothermic reaction is when they take in the the energy
• Solid is formed when the liquid goes cloudy
• Examples of exothermic reaction

  • combustion
  • respiration
• Examples of endothermic reaction

  • sports injury pack
  • photosynthesis
• When the particles are heated the particles move faster
• Catalyst is the increase in rate of a chemical reaction
•  Hydrocarbon is an organic compound consisting entirely of hydrogen and carbon