10 examples of superconductors: (by ChatGPT)

1. Mercury – The first discovered superconductor. It becomes superconducting at around -269°C (4.2 Kelvin).
2. Lead – This metal becomes a superconductor at around -265°C (7.2 Kelvin).
3. Yttrium Barium Copper Oxide (YBCO) – A ceramic material that becomes superconducting at higher temperatures, around -183°C (90 Kelvin).
4. Niobium – A metal that becomes superconducting at around -263.5°C (9.3 Kelvin).
5. Magnesium Diboride (MgB2) – This compound becomes superconducting at -234°C (39 Kelvin), making it one of the highest temperature metallic superconductors.
6. Lanthanum Barium Copper Oxide (LBCO) – Another high-temperature superconductor that operates around -243°C (30 Kelvin).
7. Iron Pnictides – A family of iron-based compounds that show superconductivity at temperatures up to -218°C (55 Kelvin).
8. Bismuth Strontium Calcium Copper Oxide (BSCCO) – A high-temperature superconductor that works around -195°C (78 Kelvin).
9. Niobium-Titanium (NbTi) – A metal alloy used in superconducting magnets, such as those in MRI machines, with a superconducting temperature of around -268°C (4 Kelvin).
10. Mercury Barium Calcium Copper Oxide (HgBa2Ca2Cu3O8) – A complex compound that becomes superconducting at around -135°C (138 Kelvin), one of the highest temperatures for superconductors.

These materials become superconductors when they are cooled down to very low temperatures, allowing electricity to flow through them without any resistance.