Element source: it exists in most zirconium mines
Element use: It is useful because it is easy to emit electrons (such as filaments used as incandescent lamps). The cathode ray tube as an X, hafnium and tungsten or .......
Element source: it exists in most zirconium mines
Element use: It is useful because it is easy to emit electrons (such as filaments used as incandescent lamps). The cathode ray tube as an X, hafnium and tungsten or .......