they are NOT good conductors of heat and they are brittle solids.
Carbon, phosphorus, sulfur, and iodine. If metalloids are included, also silicon, germanium, arsenic, selenium, antimony, and tellurium.
carbon
Assuming that "least nonmetallic" means the same as "most metallic", francium.
Oxygen is the most active nonmetallic element in group 16, also known as the oxygen group or chalcogens. It readily reacts with many elements to form oxides.
Nitrogen, the first element in Group 15, has the most nonmetallic properties. It is a diatomic gas at room temperature, demonstrating typical nonmetal characteristics such as covalent bonding and low reactivity.
Calcite is a compound and therefore cannot be classified as a metal or nonmetal.
Carbon, phosphorus, sulfur, and iodine. If metalloids are included, also silicon, germanium, arsenic, selenium, antimony, and tellurium.
anything
Fluorine
carbon
Density is the characteristic used in the identification of solids that involves measuring mass and volume. Density is calculated by dividing an object's mass by its volume, providing a unique value that can help identify different types of solids.
Assuming that "least nonmetallic" means the same as "most metallic", francium.
The nonmetallic physical characteristic of gypsum is its pearly or silky luster when it is broken into thin sheets or cleaved. This quality gives gypsum a unique appearance compared to metallic substances.
oil is nonmetallic
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............
One physical characteristic that does not apply to gases is a definite shape. Unlike solids and liquids, gases do not have a fixed shape; they take the shape of their container. Additionally, gases have low density compared to solids and liquids, and they can be easily compressed, which is another characteristic that distinguishes them from other states of matter.
There are a few reactions wich happen between two solids. but the reason most reactions wont work between two solids is because the electrons aren't free enough to move.