The diagram is a representation of the electron sea model. which statement best describes what is happening in this model? the electrons are floating to the top of the nuclei of metal atoms. the electrons are sinking down between the nuclei of metal atoms. the electrons are moving easily between the nuclei of metal atoms. the electrons are in fixed positions between the nuclei of metal atoms.

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.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.