they are NOT good conductors of heat and they are brittle solids.
They are usually brittle and are terrific insulators of electricity
They are non conductors of electricity
good conductorrs of heat
brittle
Assuming that "least nonmetallic" means the same as "most metallic", francium.
Carbon, phosphorus, sulfur, and iodine. If metalloids are included, also silicon, germanium, arsenic, selenium, antimony, and tellurium.
covalent bonds and molecular solids are characteristic of organic compounds
carbon
bismuth
anything
Streak Test, because nonmetallic minerals typically streak colorless/white, and metallic minerals typically streaks dark/characteristic color.
Assuming that "least nonmetallic" means the same as "most metallic", francium.
Fluorine
density
Carbon, phosphorus, sulfur, and iodine. If metalloids are included, also silicon, germanium, arsenic, selenium, antimony, and tellurium.
covalent bonds and molecular solids are characteristic of organic compounds
carbon
bismuth
porous is actually adjective which means having pores.porous solids are those solids which has porous nature.for instance alight soft foam.another characteristic of porous solids is that they absorb water like cotton so it is also a porous solid............
nonmetallic
oil is nonmetallic