Tantalum
Definition and meaning of Tantalum in chemistry.
![Tantalum element card: symbol Ta, atomic number 73, atomic mass 180.95, electron configuration [Xe] 4f¹⁴ 5d³ 6s², oxidation states +5, Transition metal, group 5, period 6, solid at room temperature.](/assets/images/terms/tantalum-chemical-element.webp)
Tantalum is a rare, hard, blue-gray transition metal with the chemical symbol Ta and atomic number 73. It is highly valued for resisting corrosion and surviving under extreme temperatures. The metal is also completely compatible with living human tissue in surgeries.
In more detail
Tantalum is a refractory metal, which means it can withstand incredibly high heat without melting. Only a few elements like tungsten and carbon have higher melting points. In nature, tantalum is found in complex oxide minerals like tantalite.
It always appears alongside niobium, another transition metal with very similar chemical properties. Solid tantalum is completely immune to boiling aqua regia, which is a powerful mixture of acids. It resists almost all other acids because a tough oxide layer forms on its surface.
Chemists place tantalum in group 5 on the periodic table of elements. The metal commonly forms stable compounds with a +5 oxidation state. Tantalum pentoxide, or Ta2O5, is a key compound used in electronics.
This white powder helps capacitors hold more charge in smaller sizes. Miners extract the metal by dissolving the ore in hydrofluoric acid. A common student misconception is that tantalum is toxic because it is a heavy metal.
In fact, tantalum is highly biocompatible, meaning it does not react with bodily fluids. This inert nature makes the metal very safe for permanent medical implants. Doctors use it to make strong artificial joints and protective skull plates. The metal does not trigger any negative response from the human immune system.
Key facts
| Field | General Chemistry |
|---|---|
| Symbol | Ta |
| Atomic number | 73 |
| Atomic mass | 180.95 u |
| Category | Transition-Metal |
| State at room temperature | Solid |
The electronics industry uses most of the world's tantalum to build tiny capacitors. These components store electrical energy and are essential for smartphones and laptops. They are chosen because they hold a large charge in a very small space.
Frequently asked questions
Why is tantalum classified as a conflict mineral?
It is often mined in areas with armed conflict, like parts of Africa. The money from selling these minerals has sometimes funded local wars and violence.
How is tantalum utilized within the field of modern medicine?
It is completely inert and does not irritate human tissue. Doctors use it to make surgical threads, bone plates, and artificial joints.
Can tantalum capacitors explode like other capacitors?
They can catch fire or fail if they receive too much voltage. However, they are highly reliable when used correctly in low-voltage electronics.
Related terms
Sources & references
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