As the wolf population decreases, the moose population increases and vice-versa
Its a reactant, comes on the left side of the yielding arrow.
The answer for this problem is 305.2 because you múltipley and thats how you get the answer by mulyiplying
Protons-19 because protons are equal to the atomic number which is 19 , electrons-19 electrons are equal to number of protons, neutrons-20 because the mass number of potassium is 39 so subtract 39 from 19 (atomic number) which gives us 20