We elaborate the uses of Thulium and atomic properties with characteristics. Thulium is a silver-gray chemical element with atomic number 69. Its symbol is Tm and it belongs to the group of lanthanides and its normal state in nature is solid. Thulium is located at position 69 on the periodic table.
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On this page you can discover the chemical properties of thulium and information about thulium and other elements of the periodic table such as thorium, protactinium, neptunium or plutonium. You will also learn what thulium is for and you will know its uses through its properties associated with thulium such as its atomic number or the usual state in which thulium can be found.
You can see qualities of thulium such as its melting and boiling point, its magnetic properties or what its chemical symbol is. In addition, here you will find information about its atomic properties such as the distribution of electrons in thulium atoms and other properties.
For some elements, part of this information is unknown. In these cases we show the properties attributed to them.
Thulium properties
Thulium is part of the group of lanthanides. Lanthanides are also called rare earths since they are commonly presented as oxides. Together with the actinides, the lanthanides form the internal transition elements.
The state of thulium in its natural form is solid. Thulium is a silver-gray chemical element that belongs to the group of lanthanides. The atomic number of thulium is 69. The chemical symbol for thulium is Tm. The melting point of thulium is 1818 degrees Kelvin or 1545.85 degrees Celsius or degrees Celsius. The boiling point of thulium is 2220 degrees Kelvin or 1947.85 degrees Celsius or degrees Celsius.
Atomic properties of thulium
The atomic mass of an element is determined by the total mass of neutrons and protons that can be found in a single atom belonging to this element. Regarding its position within the periodic table of elements, it can be found in period 6. Thulium has an atomic mass of 168.93421 u.
The electron configuration of thulium is [Xe] 6s24f13. The electronic configuration of the elements determines the way in which the electrons are structured in the atoms of an element. The mean radius of thulium is 175 pm and its atomic radius or Bohr radius is 222 pm. Thulium has a total of 69 electrons whose distribution is as follows: In the first shell it has 2 electrons, in the second it has 8 electrons, in its third shell it has 18 electrons, in the fourth, 31 electrons, in the fifth shell it has 8 electrons and in the sixth, 2 electrons.
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Thulium characteristics
Below you can see a table that shows the main characteristics of thulium.
| Thulium | ||
|---|---|---|
| Chemical symbol | Tm | |
| Atomic number | 69 | |
| Period | 6 | |
| Appearance | silver grey | |
| Block | F | |
| Density | 9321 kg / m3 | |
| Atomic mass | 168.93421 u | |
| Medium radius | 175 pm | |
| Atomic radio | 222 | |
| Electronic configuration | [Xe] 6s24f13 | |
| Electrons per shell | 2, 8, 18, 31, 8, 2 | |
| Oxidation states | 3 | |
| Oxide | basic | |
| Crystal structure | hexagonal | |
| State | solid | |
| Melting point | 1818K | |
| Boiling point | 2220K | |
| Heat of fusion | 16.84 kJ / mol | |
| Electronegativity | 1.25 | |
| Specific heat | 160 J / (Kkg) | |
| Electric conductivity | 1.5106S / m | |
| Thermal conductivity | 16.8 W / (K m) | |
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