Exothermic reactions are chemical reactions close chemical reaction When chemical bonds are broken and made between atoms, so that new substances (compounds or elements) are made. which release ...

IntroductionCommercial heat packs (containing iron and water, or supersaturated sodium acetate) and cold packs (various ammonium salts) can be used to show exo- and endothermicity.Heat packs that ...

In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue investigates chemical reactions involving sodium. Find out how the electron configuration ...

Tell students that when the temperature of a chemical reaction increases, the reaction is called an exothermic reaction. The first part of the word, exo, means out or out of, and thermic has to do ...

A small piece of sodium metal is placed in a flask of chlorine gas. A little water helps expose the sodium so it can react with the chlorine gas. The reaction releases a lot of heat as the ionic ...

The tragic accident, when a restaurant manager in Massachusetts died, was the result of a simple chemical reaction called neutralization. That's when an acid and a base are combined. Unfortunately in ...

Sodium, ubiquitous on Earth ... and in 1811 he gave chlorine its name after unambiguously recognizing it as a pure element — although discovered in 1774 by the Swedish chemist Carl Wilhelm ...