What must be true for a spontaneous reaction in an electrochemical cell? The overall cell potential must be positive.
The overall cell potential must be negative.
The cathode's standard reduction potential must be positive.
The cathode's standard reduction potential must be negative.

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

4. absorption has the highest risk of overdose due to increased potency. a. rectal b. oral c. transdermal d. intranasal