Yes. Holmium is a metal, classified as a lanthanide on the periodic table.

How many protons does holmium have?

Holmium has 67 protons. Its atomic number is 67, which is also the number of electrons in a neutral atom of holmium.

What group and period is holmium in?

Holmium is in period 6 of the periodic table. As a lanthanide in the f-block, it sits in a separate row below the main table and has no standard group number.

What is the atomic mass of holmium?

The atomic mass of holmium is 164.93 u (unified atomic mass units).

Element 67

Holmium (Ho)

Lanthanide · Period 6 · f-block

Holmium (Ho) is element 67 of the periodic table, a lanthanide in period 6 (f-block) with an atomic mass of 164.93 and is a solid at standard conditions.

At a glance

Atomic number: 67
Symbol: Ho
Atomic mass: 164.93 u
Category: Lanthanides
Period: 6
Block: f-block
Phase at STP: solid

Electron structure

Electron configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f11 5s2 5p6 6s2
Shorthand configuration: [Xe] 4f11 6s2
Electrons per shell: 2, 8, 18, 29, 8, 2
Oxidation states: +2, +3

Physical properties

Melting point: 1,734 K (1,460.85 °C)
Boiling point: 2,993 K (2,719.85 °C)
Density: 8.795 g/cm³
Phase: solid

Atomic properties

Electronegativity (Pauling): 1.23
Atomic radius: 226 pm
Covalent radius: 192 pm
First ionization energy: 581 kJ/mol
Electron affinity: 50 kJ/mol

Notable isotopes

Notable isotopes of Holmium: mass number, atomic mass, natural abundance, and stability.
Isotope	Mass	Abundance	Stability
Ho-165	164.93033	100%	Stable

Common uses

Magnets
Lasers
Nuclear reactors
Glass coloring

Discovery

Year: 1878
Discovered by: Marc Delafontaine, Jacques-Louis Soret
Country: Switzerland

Frequently asked questions

Is holmium a metal?: Yes. Holmium is a metal, classified as a lanthanide on the periodic table.
How many protons does holmium have?: Holmium has 67 protons. Its atomic number is 67, which is also the number of electrons in a neutral atom of holmium.
What group and period is holmium in?: Holmium is in period 6 of the periodic table. As a lanthanide in the f-block, it sits in a separate row below the main table and has no standard group number.
What is the atomic mass of holmium?: The atomic mass of holmium is 164.93 u (unified atomic mass units).

Keep exploring

Holmium's row is on the printable element property sheet, and its tile is on the periodic table wall chart - the same numbers as above, laid out for A4 or A3 paper.