Chiari malformation In Chiari malformation surgery, doctors remove a small section of bone at the back of your skull to make room for part of your brain (cerebellum) and relieve pressure on your brainstem, cerebellum and spinal cord.
Europium is a ductile metal with a hardness similar to that of lead. It crystallizes in a body-centered cubic lattice. Some properties of europium are strongly influenced by its half-filled electron shell.Europium has the second lowest melting point and the lowest density of all lanthanides.uropium is a ductile metal with a hardness similar to that of lead. It crystallizes in a body-centered cubic lattice. Some properties of europium are strongly influenced by its half-filled electron shell.
Charges of an elements ions can be worked out by figuring out if the element will GAIN or LOSE electrons when they react. So Sulfur with electron configuration of 2,8,6 in its outer valance shell will need to GAIN two electrons to get 8, and have a stable outer shell. This will mean there are 2 more electrons then protons and the overall ion will have a negative charge. So S2- (-2) is the answer.