i believe the answer is flourine.
Any element except helium and possibly neon can form some compound.
Fluorine can form compounds with every element except Helium. Many compounds with the noble gases (such as neon fluoride) are pretty unstable and most are very reactive, but they can be formed.
There are no common compounds of helium and probably are no compounds of helium at all, because helium is the least reactive of all elements.
The only similarity elements and compounds share are that they're the building blocks of matter. Their differences are that elements are are made of only one type of periodic element. Compounds are made of at least two periodic elements bonded together. For example, salt is a compound of sodium-chloride and the helium in balloons is made up entirely of helium molecules.
There is no element with such symbol. However the symbol U stands for uranium
Any element except helium and possibly neon can form some compound.
why helium does not react with other elements to form compounds
Helium is an element (abbreviated "He"). Elements are types of substance that, when combined, form compounds and chemicals.
Fluorine can form compounds with every element except Helium. Many compounds with the noble gases (such as neon fluoride) are pretty unstable and most are very reactive, but they can be formed.
Helium. All elements have neutrons except hydrogen.
Helium itself is an element and it forms no chemical compound whatsoever, therefore, it is a noble gas. The atom of Helium is so inert that it cannot even form a molecule with another atom of Helium, hence is monoatomic.
There are no common compounds of helium and probably are no compounds of helium at all, because helium is the least reactive of all elements.
Helium is one element and does not chemically react.
Examples are helium, neon, argon.
Helium is an element. It is the second element on the periodic table, therefore containing two protons. It is not made of compounds.
The only similarity elements and compounds share are that they're the building blocks of matter. Their differences are that elements are are made of only one type of periodic element. Compounds are made of at least two periodic elements bonded together. For example, salt is a compound of sodium-chloride and the helium in balloons is made up entirely of helium molecules.
Because helium is an unreactive chemical element.