a. An isotope of Cr3+ ion containing 24 protons and 27 neutrons would contain ( ) electrons? Explain your answer. b. Which of the following species has the greatest number of electrons? Explain your answer clearly. CI-, Ca2+, P3-, K, Ar c. A hypothetical element (X) has two isotopes. One of the isotopes has an abundance of 75.0% and a relative mass of 12.0 amu, while the other has an abundance of 25.0% and a relative mass of 14.0 amu. Determine the average mass of the element. Show your calculation