In what ways do members of different species interact?

What is the study of how matter and energy interact? a. biology b. physics c. planetary science d. chemistry

In which direction will the following reaction go if the standard reduction potentials are 0.80 v for ag/ag+ and –0.44 v for fe/fe2+? ag+ + fe → ag + fe2+ a.)forward b.)the reaction cannot occur. c.) not enough information is given. d.) reverse

What is the maximum number of electrons that an atomic orbital can contain?