Which two properties apply to most elements that conducts heat: malleable, brittle, highly combustible, has free electrons

Malleable, has free electrons

The two properties that apply to most elements that conduct heat are that they are malleable and they have free electrons.Metals are held together by metallic bonding.For metallic bonds to form, there must be an attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by all the atoms by losing their outermost shell electrons.

To know more about:-

link

malleable, has free electrons

Explanation:

The two properties that applies to most elements that conducts heat is that they are malleable and they have free electrons.

Most substances that conducts heat readily are metals.

Metals are held together by metallic bonding. For a metallic bonds to form, there must be attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by all the atoms by losing their outermost shell electrons. The physical properties of metals such as malleability and conduction is due  to this bond type.