Name the non-metals a. with lustre. b. which is hard solid. c. conduct electricity or heat except for one. d. used in disinfection of drinking water.

The non metal with lustres, which is hard,conduct electricity and used in disinfection of drinking water is graphite

graphite an allotrope of carbon is only one non- metal which is a good conductor electricity and is highly refactory and chemically inert. Its luster is metallic to dull and has a hardness of of 1-2. Its specific gravity is 2.2 and its crystal system is hexagonal.

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)