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Nadia Heidenreich ∙
Noble gasses are not reactive. :)
Only Fluorine belongs in the halogen family.
Transition metals.
The atomic number.
Spread the weight of the ship over a greater volume
The biggest safety concerns relating to walking surfaces are probably the various conditions and defects that can result in slips, trips, and falls.
Argon (Ar) is one of them
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