an atom of iron has at least three different isotopes.  what is the difference between an isotope of  55fe and an isotope of  58fe? question 1 options: three protonsthree electronsthree neutronsone proton and two neutronssavequestion 2  (1 point)  choose the best description of what is wrong with the following electron configuration for an electrically neutral atom of chlorine (atomic number 17) 1s2  2s2  2p5  3s2  3p6question 2 options: the total number of electrons in the configurations does not equal 17, the atomic number of chlorinethere are low energy orbitals which have not been filled to hold the maximum number of electronsthe configuration is incorrect for both of these reasons