Question

the word family implies that the elements in a family have like properties. what property do the elements of the noble gas family all share? a they are not reactive. b they are very reactive. c they are found in the earths atmosphere. d they react readily with oxygen in the air.

Explanation:

Noble gases (like He, Ne, Ar, Kr, Xe, Rn, Og) have a full valence electron shell. This makes them chemically inert (not reactive) because they don't need to gain or lose electrons to achieve stability. Option B is wrong as they aren't reactive. Option C: while some are in the atmosphere (e.g., Ar), this isn't a defining chemical property shared by all (e.g., Rn is radioactive and rare in atmosphere). Option D is wrong as they don't react readily with oxygen. So the correct property is being non - reactive.

Answer:

A. They are not reactive.