A. Draw the line-bond structural formula for water (H2O), sodium chloride (NaCl), methane (CH4), hydrogen gas (H2), and ammonia (NH3). Then, characterize the type of bond that each molecule contains (ie. ionic, nonpolar covalent, polar covalent).

B.
On the molecules listed in #1, draw the relative position(s) of the shared electrons based on the electronegativity of the atoms.

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.