Using only the information available in the periodic table, consider the elements calcium and chlorine. From their location on the periodic table, identify the oxidation state and number of valence electrons for calcium and chlorine. Which statement most
accurately describes the compound formed by calcium and chlorine?

Because you ate playdough

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m

Theyre semiconductors.