Holmium Element in Periodic Table | Atomic Number Atomic Mass

Holmium Element:

Holmium is a chemical element with atomic number 67 and it is represented by the symbol Ho. It is included in the lanthanide series of periodic table. Ho is preceded by dysprosium and succeeded by erbium in the lanthanide series. Like other lanthanide elements, it is a silvery white solid metal under normal conditions of temperature and pressure. Ho is relatively soft and malleable. It melts at 1461 °C and boils at 2600 °C.  It gets slowly tarnished in air and burns readily to form holmium oxide Ho₂O₃. Ho reacts slowly with cold water but quickly with hot water to form holmium hydroxide with release of hydrogen gas. Ho reacts with all halogen to form respective holmium trihalides.

Holmium has only one natural isotope with mass number 165. Among the synthesized isotopes, holmium-163 is found to be most stable, with a half-life of 4570 years.

Uses Of Holmium Element:

Holmium has a property of absorbing neutrons and hence it used in controlling nuclear chain reactions. Ho alloys are used in magnets. Because of its stronger magnetic property, it is also used MRI scanning. Holmium lasers are used in treating abnormal eye pressure, glaucoma (an eye disorder) and to repair the failed glaucoma surgeries.

Holmium Element Information:

Discovery year:(1878)

Discovered by:Jacques-Louis Soret

Atomic number: 67

Relative atomic mass: 164.930  

Electron configuration: [Xe] 4f¹¹ 6s²

Block: f-block

Other elements in the same block:

Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Erbium, Thulium, Ytterbium, Lutetium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium and  Lawrencium are the elements in the same block.

Period: period 6

Other elements in the same period:

Caesium, Barium, Lanthanum,  Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Astatine and Radon

Group: Lanthanides

Other elements in the same group:

Cerium, praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Erbium, Thulium, Ytterbium, Lutetium.

Other elements in the same orbital:

Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Erbium, Thulium, Ytterbium and Lutetium are the elements in the same orbital.

Allotropes: none

Key isotopes: ¹⁶⁵Ho 

Melting point: 1472°C, 2682°F, 1745 K 

Boiling point: 2700°C, 4892°F, 2973 K

Element category: lanthanide

Density (g cm⁻³):  8.80

CAS number: 7440-60-0

Color: silvery white

You can know detailed information for each element,

Hydrogen, Helium, LithiumBeryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine,  Neon , Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton,  Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium, Iodine, Xenon,  Caesium, Barium, Lanthanum,  Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Astatine, Radon,  Francium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicium, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine, Oganesson.