Question

Use the periodic table to answer the question.

Periodic table showing electronegativity of elements, increasing left to right and bottom to top.

Based on patterns in the periodic table, which list shows the acids in order from strongest to weakest?

(1 point)
Responses

PH3, H2S, HCl
PH3, H2S, HCl

HCl, PH3, H2S
HCl, PH3, H2S

HCl, H2S, PH3
HCl, H2S, PH3

H2S, PH3, HCl

Answer 1

HCl, H2S, PH3

HCl is the strongest (Cl– stabilizes the negative charge well), H2S is weaker, and PH3 is the weakest (P is less electronegative so the H–P bond is less polar and the conjugate base is least stabilized).