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Ionic bond - this is an electrostatic force of attraction between two oppositely charged ions, i.e. a positively charged ion and a negatively charged ion. Covalent bond - this is a bond where electrons are s...

Molecules are very small, much smaller than we can see with our eyes. For this reason, we can’t simply just count the number of molecules in a sample by looking at it. Even if we could, there are so many mol...

Oxidation and Reduction forms the basis of Redox reactions - where electrons are exchanged between reactants to form new products. Oxidation is the LOSS of electrons. Eg: Fe 2+ - e - --> Fe 3+ Reduction i...

Elements of group 0 are called noble gases. These elements have stable arrangements of electrons in their outermost shell. The chemical reactivity of a group highly depends on the number of electrons in the ...

The evolution of heat from a reaction is often classified as being exothermic or endothermic, but how do you know which one it is in order to assign the appropriate sign? A simple way to be sure of which typ...