Why is tantalum commonly used in electrolytic capacitors?

High dielectric constant of its stable oxide

The excellent corrosion resistance of tantalum is mainly due to:

A protective passive oxide film

Inherent inertness with no surface film

Biocompatibility and corrosion resistance

High dielectric constant and chemical stability

Superconductivity at room temperature

Trivia · Knowledge

Ten-question quiz on tantalum (Z=73): why it's used in capacitors, its corrosion resistance, common compounds, and the main ore minerals.0 takes

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01Why is tantalum commonly used in electrolytic capacitors?
02Which oxide of tantalum forms the dielectric layer in tantalum capacitors?
03The excellent corrosion resistance of tantalum is mainly due to:
04Which of the following is a well-known hard refractory compound of tantalum used in cutting tools and coatings?
05Which tantalum compound is commonly used as a diffusion barrier and in microelectronics (also formed by reactive sputtering)?
06What is the approximate atomic number of tantalum?
07The principal ore group mined for tantalum (often called 'coltan' in trade) is:
08Another mineral name specifically rich in tantalum and closely related to columbite is:
09Which property of tantalum metal makes it suitable for medical implants and surgical instruments?
10Tantalum pentoxide (Ta2O5) is valued in electronics primarily for its: