question: located in the last column of the p...
question: located in the last column of the periodic table, noble gases are the least chemically reactive elements because they have answer options: select one of four stable outermost electron shells. unstable outermost electron shells. unstable proton shells. stable proton shells.
Answer
# Answer:
stable outermost electron shells.
# Brief Explanations:
Noble gases are in the last column of the periodic table. Their chemical reactivity is related to electron shells. Protons are in the nucleus, not in shells. Unstable electron shells would make elements more reactive. Noble gases have stable outermost electron shells (usually a full valence shell like 8 electrons for most, except helium with 2), which makes them the least chemically reactive.