Explain the difference in radius between the ions and their respective neutral atoms.

The radius of an ion can be either larger or smaller than the radius of an atom, depending on the electrical charge of the ion. The main difference between atomic radius and ionic radius is that atomic radius is the radius of a neutral atom whereas ionic radius is the radius of an electrically charged atom.

Explanation:

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answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.