Group 4 is the second group of transition metals in the periodic table. ... All the group 4 elements are hard, refractory metals. Their inherent reactivity is completely masked due to the formation of a dense oxide layer that protects them from corrosion, as well as attack by many acids and alkalis.

What does group 4 react with?

The group 4 metals also react with hydrogen, nitrogen, carbon, and boron to form hydrides (such as TiH₂), nitrides (such as TiN), carbides (such as TiC), and borides (such as TiB₂), all of which are hard, high-melting solids. Many of these binary compounds are nonstoichiometric and exhibit metallic conductivity.

What are 4th A group elements?

Group 4A (or IVA) of the periodic table includes the nonmetal carbon (C), the metalloids silicon (Si) and germanium (Ge), the metals tin (Sn) and lead (Pb), and the yet-unnamed artificially-produced element ununquadium (Uuq). The Group 4A elements have four valence electrons in their highest-energy orbitals (ns²np²).