The answer usually given to this question is "metal" and that answer is correct.
But, a metal is actually a material that conducts electricity well. The reason both conductivities, electrical and thermal, are high is that the "free electrons" that make a metal conduct electricity are also the mechanism for conducting heat.
Malleable means "easily shaped" and the question remains as to why metals are easily shaped.
Atoms in solids are held together by "bonds" formed by the electrons of the constituent atoms. (That is a long diversion to explain further.) The "bonds" in a metal are different than those in a generic materials because the electrons in those bonds are not strongly localized in the immediate vicinity of the individual atoms. These "metal" bonds are actually diffused throughout the metal. As a result, moving metallic atoms relative to one another does not require large distortions of the bonds and does not necessitate breaking bonds. The movement or material requires a general rearrangement of the electronic structure of the diffuse metallic bonds but that leaves the "bonds" in place.
Thus, gradual disruption of atomic arrangement associated with changing the shape does not result in the destruction of the microscopic arrangements of "bonds" as it does in a brittle material where cracks result.
A small caveat is necessary. Cracks do develop in metals, but the explanation here is one of degree and a qualitative description of the microscopic explanation of malleability.
t that is a malleable, shiny solid, but doesn't conduct heat or electricity
nonmetal
no they do not conduct because they are neutral things
yes, as all it's constituent substances can also conduct electricity
No, air is not an electrolyte. Electrolytes are substances that conduct electricity when dissolved in water, whereas air is a mixture of gases and does not conduct electricity in the same way.
t that is a malleable, shiny solid, but doesn't conduct heat or electricity
nonmetal
Carbon is not malleable but in some forms can conduct electricity. Gold is malleable and conductive.
Metals are the group of elements that are malleable, conduct electricity, and are lustrous. Metals are typically found on the left side of the periodic table.
Metals can conduct electricity, are malleable (can be hammered into thin sheets), and have a shiny appearance (luster).
nonmetals
Nonmetals
Most molecular substances do not conduct electricity since the ions don't dissociate very well with molecular substances. However, most ionic substances do conduct electricity very well due to their ability to dissociate very well in water.
The alkali metals, transition metals and metals in group 13, 14, and 15 on the periodic table all are malleable and good conductors of electricityEach of these groups has different characteristics, but all are able to conduct electricity and be formed or shaped easily.
Metals
Insulators. Their valence electrons are tightly bound because the valence shell is close to full or full. Since each shell can only only hold a certain amount of electrons, the number of electrons depends on which shell is the outer or valence shell.
conductors:copperironaluminiuminsulators:woodplasticglassHOPE YOU LIKE IT =) HAVE A GOOD DAY!