Which element from Groups 8 through 10 is used to separate H2 from other gases?
To find the element from Groups 8 through 10 that can be used to separate H2 (hydrogen gas) from other gases, we need to understand the properties of these elements and their ability to interact with hydrogen.
Group 8 elements are known as the noble gases, which include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These noble gases are chemically inert and do not readily interact or form compounds with other elements, including hydrogen.
Moving to Group 9, we find cobalt (Co), rhodium (Rh), iridium (Ir), and meitnerium (Mt). These elements are transition metals, but they do not possess specific properties that make them particularly effective in separating or isolating hydrogen from other gases.
Finally, Group 10 consists of nickel (Ni), palladium (Pd), platinum (Pt), and darmstadtium (Ds). Among these elements, palladium (Pd) is well-known for its ability to selectively react with hydrogen gas. Palladium can absorb and form a tight bond with hydrogen molecules, allowing it to separate hydrogen from other gases through a process called hydrogenation. This property of palladium is widely used in various industrial applications, such as hydrogen purification and removal of impurities.
Therefore, the element from Groups 8 through 10 that is commonly used to separate H2 from other gases is palladium (Pd).