Holmium is a chemical element; it has symbol Ho and atomic number 67. It is a rare-earth element and the eleventh member of the lanthanide series. It is a relatively soft, silvery, fairly corrosion-resistant and malleable metal.

Holmium, chemical element, a rare-earth metal of the lanthanide series of the periodic table. Holmium is a moderately hard, silvery white metal that is relatively stable in air. It is a very strong paramagnet above 133 K (−140 °C, or −220 °F).

Element Holmium (Ho), Group 19, Atomic Number 67, f-block, Mass 164.930. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Holmium. Holmium is a chemical element with symbol Ho and atomic number 67. Classified as a lanthanide, Holmium is a solid at room temperature.

Holmium is a bright, soft, silvery-white, rare earth metal that is both ductile and malleable. It does not react in dry air at normal temperatures, but rapidly oxidizes to a yellow oxide (Ho 2 O 3 ) in moist air or when heated.

Holmium is a bright silver lustrous metal. It is soft and corrosion resistant element. At standard temperature and pressure, it is stable in dry air. It oxidizes quickly in moist air and high temperature to form yellowish oxide.

Mar 5, 2014 · Holmium is a lanthanoid (4f) element and its preferred oxidation state is +3, as in its oxide Ho 2 O 3 and in HoF 3. In solution it exists as [Ho (H 2 O) 9] 3+ ions. When it comes to powerful magnets, nothing beats holmium. John Emsley investigates.

Mar 9, 2017 · Holmium is atomic number 67 with element symbol Ho. It is a rare earth metal belonging to the lanthanide series.

Holmium (pronunciation: HOHL-mee-em) is a silvery metal belonging to the group of lanthanides and represented by the chemical symbol Ho [1, 2]. It has one stable naturally occurring isotope, 165 Ho, with a natural abundance of 100% while its most stable radioisotope, 163 Ho has a half-life period of 4,570 years [3].

Holmium is the 67th element in the periodic table and has a symbol of Ho and atomic number of 67. It has an atomic weight of 164.93033 and a mass number of 165. Holmium has sixty-seven protons and ninety-eight neutrons in its nucleus, and sixty-seven electrons in six shells.