Answer:
Halogens - 6 valence electrons
Step-by-step explanation:
Valence electrons are the number of electrons present in the outermost shell of the atom.
Noble gases have 8 valence electrons which is the maximum and are stable. They are inert by nature since they don't have to combine with any other element to attain stability.
Halogens have 7 valence electrons. They are high electronegative and have great attraction for electrons so that they can attain stability by forming the octet.
The valence electrons in transition metals varies as a group of columns are named transition metals.
Alkali earth metals has two valence electrons.
Hence the incorrect statement here is
Halogens - 6 valence electrons
