Why do you think it's molybdenum?

Properties of molybdenum: silvery white metal, hard and tough, one of the refractory metal elements. It is a VIB group element in the periodic table, with atomic number 42, atomic weight 95.94, density 10.2g/cm3, melting point 26 10℃ and boiling point 5560℃. The valence is +2, +4, +6, and the stable price is +6. The highest ionization energy is 7.099 eV. It is not corroded by air at normal temperature. Molybdenum has never appeared as a natural element, and is always combined with other elements. Molybdenum is a sulfur-loving element, so molybdenite (MoS2) is the main occurrence state of molybdenum, followed by molybdenum and oxide minerals of elements such as tungsten, copper, vanadium, rhenium and niobium. There are more than 20 known molybdenum deposits, but only four of them are of industrial value: molybdenite (MoS2), calcium molybdate (CaMoO4), molybdenite [Fe2 (MoO4) 3.7 1/2H2O] and lead molybdate (PbMoO4). Except molybdenite is primary molybdenum ore, the rest are secondary molybdenum ore or associated molybdenum ore. Molybdenum is stable in air or water at room temperature, but it begins to slightly oxidize when the temperature reaches 400℃, and violently oxidizes to produce MoO3 when it reaches 600℃. Dilute nitric acid and alkali solution have no effect on molybdenum. Molybdenum can be dissolved in nitric acid or hot sulfuric acid solution. Molybdenum and hydrogen do not react at very high temperature, but react with nitrogen at 1500℃ to form molybdenum nitride. When it reacts with carbon and hydrocarbons above1100 ~1200℃, it will not be oxidized and differentiated even in the oxidation atmosphere of 1500 ~ 1700℃.