g. Iron when exposed to air and moisture gets rusted. But still we call it a lustrous material . why ?

Atomicity occurs to prevent updates of the database occurring only partially, which can cause greater problems than rejecting the whole series outright.some are monatomic, diatomic, triatomic etc because it shows the number of atoms. for example, monatomic means it contains only one atom.

No table found. the question asks for covalent bond based on electronegativies

Its strengthits conductivity of heat and electricity its shiny colourmalleable and ductility