Oxygen is chemically active because it reacts with other chemicals such as hydrogen to form water.
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Argon is a chemically inactive non metal.
Helium has completely filled valence orbitals (and thus has stable electronic configuration). Hence is is chemically inert or inactive. In fact, helium doesn't react with any other element.
Helium, neon, argon are used because they are chemically inactive.
LSD may chemically break down and become inactive when exposed to light.
Active
it is chemically inactive
argon
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Argon is a chemically inactive non metal.
Helium has completely filled valence orbitals (and thus has stable electronic configuration). Hence is is chemically inert or inactive. In fact, helium doesn't react with any other element.
Diamond is an allotrope of carbon.
When oxygen is part of a compound or a mineral, it is chemically bound in that position. But it is otherwise chemically identical to the oxygen in the air.
Francium is a very radioactive and very chemically reactive chemical element.
Nobel gases
Xenon is chemically inactive under STP. But under extreme conditions it reacts with more electronegative elements like fluorine and oxygen to from compounds like XeF2, XeOF4, XeF4, XeF6 etc.
oxygen