Question

${\mathbb{ \colorbox{aqua}{ \boxed{ \boxed{ \boxed{ \boxed{ \boxed {\boxed {\mathbb{ \colorbox{lime} { \boxed{ \boxed{ \boxed{ \boxed{ \boxed{question}}}}}}}}}}}}}}}}$


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​Wʜᴀᴛ ɪs ʜᴇʟɪᴜᴍ Oxɪᴅᴇ???​

Answer 1

There is no such thing (눈‸눈)

Reason:

Helium is a noble gas (it's outermost shell is already completed), it doesn't react with any other element.

Answer 2

Answer:

Description. Rare gas and oxygen mixture is a colorless odorless gas. Both gases are noncombustible; however, oxygen will accelerate the combustion of a fire.