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.
But alkali metals gives of electron to its stable form easily than other metals, and other atoms like the halogens, oxygen, sulfur, nitrogen will receives the electron easily, and energy is produce greatly. But why cesium is the most reactive of the alkali metals? This is because cesium have the biggest atomic radius in the alkali metal, it loses electron easily, while lithium is the less reactive metal in the alkali metal, because it has the smallest atomic radius and it grabs electron the tightest so it doesnât loses electron easily.