Silicon forms compounds with hydrogen which have chains of upto ______ atoms.

Silicon shows the property of catenation, i.e., the ability of an element to form covalent bonds with atoms of the same element and produce chains. Silicon forms hydrides containing chains of up to seven or eight silicon atoms, but these compounds are highly reactive. Carbon shows catenation to a much greater extent because the carbon-carbon bond is very strong and stable. Its small atomic size allows effective bonding, enabling the formation of long straight chains, branched chains and rings. Silicon-silicon bonds are comparatively weaker, which limits the length and stability of its chains.