A panic attack is an exaggeration of your bodyâs normal response to fear, stress or excitement. It is the rapid build-up of overwhelming physical sensations, such as: 1  a pounding heartbeat. 2  feeling faint. 3  sweating. 4  nausea (feeling sick).
Since four elements must be present for the combustion process to occur (fuel, heat, an oxidizing agent, and a chemical chain reaction), a fire can be extinguished by removing any one of these four elements.
5) Combustion Reaction â¢ A chemical change where an element or a compound reacts with oxygen â¢ This will often yield energy in the form of heat and light â¢ Oxygen is ALWAYS going to be on the reactant side â¢This is the main indicator that a combustion reaction has occurred.n the reactant side there is a single element and a compound, as there is on the product side. â¢ No reaction will occur if the most reactive element is already in the compound â¢ The image on the next slide should help to visualize. â¢ Notice that the couple in white are a compound on the. reactant side.