C. • Their outer most energy levels are complete with 8 electrons.
Noble gases have full outer electron shells, which makes them chemically stable and less likely to react with other elements.
Why are the noble gases the least reactive elements? (1 point)
A. • They are all radioactive.
B. • They have the same number of electrons as protons.
C. • Their outer most energy levels are complete with 8 electrons.
D. • They are the last elements in each row on the periodic table.
1 answer