At around 770 °C, iron (Fe) reaches its Curie point: the critical temperature at which it transitions from a ferromagnetic to a paramagnetic state (and vice versa). Below this temperature (770 °C ≈ 1043 K), iron’s atomic magnetic moments align within regions called magnetic domains, resulting in strong, permanent magnetism. However, when heated above the Curie point, thermal agitation disrupts this alignment, and iron loses its ferromagnetic properties, becoming paramagnetic. Iron is a classic e

62K views · 852 shares | Marie Curie discovered polonium in an experiment conducted #OnThisDay in 1898. Watch the story behind the discovery of polonium - as well as radium, which was also discovered the same year. | Nobel Prize | Facebook

Marie Sklodowska Curie discovered polonium in an experiment conducted #OnThisDay in 1898. Watch the story behind the discovery of polonium - as well as radium, which was also discovered the same year. | Nobel Prize