Neon has completely filled orbitals / energy levels. It has 8 valence electrons and has stable electronic configuration. Hence it is chemically inert and generally donot form compounds under normal conditions.
Helium is an inert gas. It is normally stable. That means that it does not normally form bonds with other atoms or compounds. Helium can be forced into temporary bonds with a handful of other elements like tungsten (Unstable compounds), but when the force is removed, these bonds disappear. There is some evidence in the chemical world that Helium perhaps could form stable compounds with certain other elements with an oxygen molecule tied into it. If this ever proves to be true, then the neon atom would be the only remaining inert gas.
Nonmetals burning in oxygen form covalent type compounds, as compared to metals which form ionic compounds.
Colored ions are normally associated with the transition metals, which aren't actually a "group" in the usual chemical sense of the word. Also, they don't have to be in aqueous solutions.
When elements and compounds combine to form new compounds the reaction is described in a chemical equation.
the footwall
No, not likely and rather unknown to do so
No. Two metals or more will form a mixture called an alloy.
Carbon normally forms four covalent bonds in its compounds, not ionic bonds.
No, ionic compounds typically form between a metal and a nonmetal. When two nonmetals combine, they are more likely to form covalent compounds, where electrons are shared between atoms rather than transferred.
No, I would not.
Noble gases do not normally form compounds.
Compounds do not form elements. Elements form compounds.
we would not be alive
Water
Normally, noble gasses don't go into any compounds. Hydrogen gas will though.
Helium is an inert gas. It is normally stable. That means that it does not normally form bonds with other atoms or compounds. Helium can be forced into temporary bonds with a handful of other elements like tungsten (Unstable compounds), but when the force is removed, these bonds disappear. There is some evidence in the chemical world that Helium perhaps could form stable compounds with certain other elements with an oxygen molecule tied into it. If this ever proves to be true, then the neon atom would be the only remaining inert gas.
glaciers