(1) They attributed those lines to the presence of three new elements, which they named neon, krypton , and xenon.(2) Consider windows that fill that space with gases like argon, krypton , or a mix of the two.(3) However, some windows use argon or krypton in this space to improve thermal performance.(4) Sometimes a mixture of krypton and argon are used instead of the mercury.(5) Other gasses - such as argon and krypton - can be used in the space between the glass panes instead of air.
