Question

Why does gallium change states in someones hand?

Answer 1

Answer: At temperatures over 29.76°C, which is below our usual body temperature of 37°C, the element gallium becomes a liquid. Whenever liquid gallium is poured from your hand onto a room-temperature surface, it solidifies. When a liquid changes state to become a solid, it expands similarly to water.

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Answer 2

Because your hand is only touching one part of the gallium, that part will heat up first and will liquify as it reaches melting temperature.

Step-by-step explanation:

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