Why are the noble gases the least reactive elements?(1 point)
Responses
They have the same number of electrons as protons.
They have the same number of electrons as protons.
Their outer most energy levels are complete with 8 electrons.
Their outer most energy levels are complete with 8 electrons.
They are the last elements in each row on the periodic table.
They are the last elements in each row on the periodic table.
They are all radioactive.