Because the outer electron shell is full as is the case with helium and neon or because it has the stable octet configuration, with 8 electrons, which is true for the rest, argon, krypton, xenon and radon.
Unreactive
The noble gases are the most stable unreactive elements on the periodic table, they are helium, neon, argon, krypton, xenon, radon
Noble gases (or group 18 elements)
The most characteristic property of noble gases is their inertness or lack of reactivity due to having a full outer electron shell. This makes them stable and unreactive under normal conditions.
The noble gases are the most unreactive family of gases. They have a full outer electron shell, making them very stable and unlikely to form chemical bonds with other elements. This includes gases such as helium, neon, argon, krypton, xenon, and radon.
Unreactive
Correct.
The noble gases are the most stable unreactive elements on the periodic table, they are helium, neon, argon, krypton, xenon, radon
Noble gases (or group 18 elements)
The most characteristic property of noble gases is their inertness or lack of reactivity due to having a full outer electron shell. This makes them stable and unreactive under normal conditions.
The noble gases are the most unreactive family of gases. They have a full outer electron shell, making them very stable and unlikely to form chemical bonds with other elements. This includes gases such as helium, neon, argon, krypton, xenon, and radon.
The "Noble gases" of group VIII are unreactive, because they are stable, due to their electron arrangements. If an atom has a full outer shell, it is "happy" and will not bond with other atoms.
Nobel gases are very unreactive.
The Noble gasses. Neon, Argon, Xenon, Radon, Krypton and Helium
In short, an element's valence shell is full and most stable when it contains eight electrons (this stability is the reason that the noble gases are so unreactive).
Most atoms of the noble gases have eight valence electrons, which corresponds to a full outer electron shell. This complete electron configuration makes noble gases highly stable and unreactive, as they do not need to gain, lose, or share electrons to achieve stability. As a result, noble gases typically do not form chemical bonds with other elements.
Noble gases doesn't form many compounds because they are extremely unreactive.