Their number of valence electrons. If they have 2/2 on the s level, then they are completely stable. btw, that's Helium, a member of the noble gasses.
Noble gases are stable because they have a full outer electron shell, which makes them less likely to react with other elements. This full outer shell gives them a balanced and stable configuration, making them less reactive than other elements.
Elements tend to react in order to achieve a more stable and lower energy state. By forming chemical bonds with other elements, they can achieve a full outer electron shell, which is a more stable configuration. This allows them to become more chemically stable.
Unstable elements are radioactive elements that spontaneously decay into other elements. Some are: Radon Uranium Plutonium See the related link for an article giving greater detail on isotope stability.
Elements in group two become more stable as they all have complete electron shell.They do not have valence electrons and hence they are less reactive.Some of the elements of group 2 are Barium,Magnesium and Calcium
Elements bond to form compounds in order to achieve a more stable electron configuration. By sharing or transferring electrons, elements can attain a full outer shell of electrons, which is typically more energetically favorable. Bonding allows elements to create a more stable structure than they have when existing as individual atoms.
STABLE all the way!
Noble gases are stable because they have a full outer electron shell, which makes them less likely to react with other elements. This full outer shell gives them a balanced and stable configuration, making them less reactive than other elements.
Of course they are more stable, therefore they formed naturally.
because of the valence toms
Each element can form stable, less stable or unstable compounds.
because of the valence toms
because of the valence toms
because of the valence toms
Elements tend to react in order to achieve a more stable and lower energy state. By forming chemical bonds with other elements, they can achieve a full outer electron shell, which is a more stable configuration. This allows them to become more chemically stable.
This is an element (more exactly an isotope) which is not radioactive.
Noble gases actually have the most stable electronic configurations in the periodic table due to having a full outer shell of electrons. This full octet makes them less likely to react with other elements, earning them the name "noble gases."
Unstable elements are radioactive elements that spontaneously decay into other elements. Some are: Radon Uranium Plutonium See the related link for an article giving greater detail on isotope stability.