Question

in this performance task you will answer four questions.
the electron configurations of two unknown atoms are shown.
electron configuration
based on the electron configuration of atom y, to which group in the periodic table does it belong?
transition metals
halogens
alkaline earth metals
alkaline metals

Explanation:

• Halogens have 7 valence electrons.
• Atom Y has 7 valence electrons (count the electrons in the outermost shell).
• Transition metals have electrons in d - orbitals (not indicated here).
• Alkaline earth metals have 2 valence electrons.
• Alkaline metals have 1 valence electron.

Answer:

halogens