Zero group elements are least reactive.
Its The Noble Gas Family which is helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn).
The noble gas group because their outermost shell of electrons is completely full unlike the other groups.
The group of unreactive nonmetals that includes argon is called the noble gases. These elements are characterized by their full outer electron shells, making them stable and unreactive under normal conditions.
Xenon belongs to the group of elements known as the noble gases, which are located in Group 18 of the periodic table. These gases are known for being largely unreactive and having a full valence shell of electrons.
The element that would have properties most similar to the new element would be an element that lies in the same group as the new element. Specifically, the element with the most similar properties will lie directly above or below that element in the group.
Radon (Rn) has the most protons of any element in Group 0 (18) with 86 protons. However, if or when Ununoctium is officially confirmed, that will become the element with most protons in that family, with 118 protons.
The element is 'argon' and belongs to noble gas family.
Noble gases are very unreactive.
Argon is the most unreactive in this series. Cheese is not an element; it is a mixture of compounds.
The noble gas group because their outermost shell of electrons is completely full unlike the other groups.
Krypton is an element not a compound. It is a noble gas (group 0) and has atomic number 36. It is a very stable and unreactive element.
Noble gases (or group 18 elements)
Most elements are completely stable and safe. However, the safest elements would be the most unreactive. So, in that sense, the Inert Gases (exc. Radon, which is radioactive) are probably the safest group of elements, as they are completely unreactive.
Helium is the element that doesn't belong in a group with any others on the periodic table. It is part of Group 18, the noble gases, which are characterized by their stable and unreactive nature.
Helium is an element, and it's name on the Periodic Table is He
Neon - one of the stable and unreactive elements of group 8.
Helium (or alpha particles)
helium