The hot water or steam is decomposed by group 13 elements except:
Boron is classified as a metalloid while the rest are considered post-transition metals. Most of the elements in the boron group show increasing reactivity as the elements get heavier in atomic mass and higher in atomic number. Boron, the first element in the group, is generally unreactive with many elements except at high temperatures. Hence, under normal circumstances boron does not react with water.