Question

question 8 of 10
which group has different numbers of valence electrons?
a. halogens
b. alkaline earth metals
c. transition metals
d. alkali metals

Explanation:

• Halogens (Group 17): Have 7 valence electrons.
• Alkaline earth metals (Group 2): Have 2 valence electrons.
• Alkali metals (Group 1): Have 1 valence electron.
• Transition metals (Groups 3 - 12): Their valence - electron count is more complex. They can have different numbers of valence electrons depending on the specific element and its electron - configuration. For example, scandium (\(Sc\)) has 3 valence electrons (\([Ar]3d^{1}4s^{2}\)), while copper (\(Cu\)) can be considered to have 1 valence electron in its common oxidation state (\([Ar]3d^{10}4s^{1}\))

Answer:

C. Transition metals