The Metal That Melts in Your Hand ???? - Video

It looks like a regular spoon. It sounds like a regular spoon. Put it in hot water and it disappears. This is gallium — the metal that melts at body temperature. ????

Gallium is a soft silvery metal with a melting point of just 29.8°C — slightly below body temperature at 37°C. It is solid at room temperature but melts almost instantly in hot water, in a warm hand, or in a cup of tea. Gallium spoons are cast in silicone molds using liquid gallium and solidified in a freezer — they look and feel identical to regular metal spoons and even produce the same metallic sound when tapped. As a metal, gallium is one of the few substances that expands when it solidifies — making it impossible to store in glass containers, which it will crack from the inside as it freezes. Gallium was predicted to exist by Dmitri Mendeleev in 1871 based purely on gaps in his periodic table — he called it eka-aluminium and predicted its melting point to within 2°C, four years before it was discovered. Today gallium is critical in semiconductor manufacturing — gallium nitride is used in high-efficiency LEDs, 5G transistors, and electric vehicle power electronics. The metal that melts in your tea is also inside every modern smartphone.

In This Video:
• Gallium spoon melting in hot water at 29.8°C while looking completely normal
• Why gallium expands when it solidifies and cracks glass containers
• How the metal that melts in your tea powers 5G networks and EV motors ????

Original video credit: physicsfun on YouTube — one of the best physics demonstration channels available.

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