Solution:
Gallium (Ga) is soft , silvery metal. Its melting point is 30°C. This metal expands by 3.1% when it solidifies and hence, it should not be stored in glass or metal containers.
The liquefied metal which expands on solidification is
Gallium (Ga) is soft , silvery metal. Its melting point is 30°C. This metal expands by 3.1% when it solidifies and hence, it should not be stored in glass or metal containers.