I believe both C) and D) are correct, because both have enough electrons to show that the element has enough protons to be a transition metal, and both elements seem to have an electron configuration that exists in the ground state. We may need more information.
30% should be the percentage of oxygen if the total mass of fe2o3 is 160.
J.J. Thomson discovered the electron 1897
B is the answer because it is
In plants, a new cell wall is fashioned between the new daughter cells
Animal cell membranes constricts to pinch the parent cell into the daughter cells
