State the number of valence electrons in an atom of sulfur

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The number of valence electrons in sulfur = 6

Explanation: -

Atomic number of sulfur = 16

The number of electrons = 16

The electronic configuration of sulfur = [Ne] 3s²3p⁴

The number of valence electrons in sulfur = Number of electrons present in 3s + number of electrons present in 3p

= 2 + 4 = 6

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.