- A blue-gray hard metallic chemical element whose atomic number is 73. It has over 30 known isotopes, of which one is stable. It is more corrosion-resistant than platinum, it is very ductile, and can be drawn into very thin wires. Its applications in electronics include its use in semiconductors, lasers, analytical instruments, capacitors, vacuum tubes, and in alloys which provide very high corrosion resistance, ductility, and strength. Its chemical symbol is Ta.
- chemical symbolTa