Using the periodic table of the elements, the properties of elements can often be used to deduce the properties of neighboring elements. In which set can the reactivity of the first three elements be used to most accurately predict the reactivity of the fourth element? A. silver (Ag), sodium (Na), strontium (Sr) → sulfur (S)
B. fluorine (F), oxygen (O), nitrogen (N) → carbon (C)
C. antimony (Sb), tellurium (Te), iodine (I) → xenon (Xe)
D. oxygen (O), sulfur (S), tellurium (Te) → selenium (Se)

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

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.