There are some elements that can't become a compound but can become a mixture. OK your question is not completely understood. A compound is made up of 2 or more elements that are chemically combined and can only be separated by chemical means. A compound is formed in a chemical reaction. A mixture is 2 or more substances (it doesn't have to be elements) that are phsically combined and can only be separated by physical means. So the answer to your question is not open because your question should be some thing like "Which element(s) does not actively combine with other elements in a compound or mixture?" The answer to that question would be many. Some elements can't come together to form a compound but they can form a mixture perfectly and visa versa.
Ans 2. The above answerer has not fully understood the question. The word "combine" defines "a compound" and excludes "a mixture". The phrase "actively combine" refers to those elements which show no spontaneous inclination to combine with any other. These elements were long referred to as "inert", but the name has recently been changed to"noble gases". The reason for their dis-inclination to combine is that in every case the atom's outer electron shell is full; in other words their valency is zero.
halogens like helium, neon, argon, krypton
All the elements except elements belonging to zero group (He, Ne, Ar, Kr and Xe which are inert in nature) can bond with other elements.
Oxygen
Elements with complete outer energy levels are noble, which means that they will not bond with other elements. They are not (normally) reactive.
Hg (Mercury) is an element, not a bond. It can bond with other elements in different way to form compounds.
With itself, and other elements.
no they can bond with any other element
Carbon can bond with itself, and many other elements.
Almost every other element except the elements in group 18 bond with oxygen to form compounds.
All the elements except elements belonging to zero group (He, Ne, Ar, Kr and Xe which are inert in nature) can bond with other elements.
Oxygen
Elements with complete outer energy levels are noble, which means that they will not bond with other elements. They are not (normally) reactive.
Hg (Mercury) is an element, not a bond. It can bond with other elements in different way to form compounds.
Transition metals can use the two outermost shells/orbitals to bond with other elements.
Yes
With itself, and other elements.
All elements in the B4 column of the periodic table are able to bond with Tungsten. However, Tungsten can only bond with other elements.
They are reactive, but selective with elements that they will bond with. Most bond with oxygen and oxygen bonds with itself. Elements in the same families tend to bond with other elements similarly, but there are no hard and fast rules.