Water
yes
nonmetals
nonmetals
semiconductors.
bad conducters or poor conduct of heat and light energy
Metalloids have an intermediate ability to conduct heat and electricity, falling between metals and nonmetals. They have some metallic properties, such as being able to conduct electricity to some extent, but not as effectively as pure metals. Their ability to conduct heat and electricity can vary depending on the specific metalloid.
Among the elements, nonmetals are generally the least like others in their ability to conduct heat and electricity. Unlike metals, which are good conductors due to the presence of free-moving electrons, nonmetals typically lack this property and are poor conductors. For example, while metals like copper and aluminum conduct electricity well, nonmetals such as sulfur and phosphorus do not. This fundamental difference sets nonmetals apart from the conductive behavior of metals.
Metalloids can conduct heat and electricity when they are in their solid state. They have properties that are intermediate between metals and nonmetals, allowing them to exhibit some degree of electrical and thermal conductivity under certain conditions.
no
Metals and Nonmetals have specific characteristics. Two characteristics of Nonmetals are typically brittle and do not shape easily, and they do not conduct heat or electricity well.
Metals generally are good conductors of electricity, and nonmetals are not.
Metals are generally good conductors of electricity due to their free electrons that can move freely within the material. Nonmetals are poor conductors of electricity because they lack free electrons for efficient conduction.