This column of the periodic table represents the halogen family. This is a family of reactive elements. Compare and contrast how the elements are similar and different.
A)
The mass numbers differ; they have the same number of protons
and valence electrons.
B)
They have different atomic numbers and mass numbers; they
have the same number of electrons.
C)
They have different atomic numbers and mass numbers, they
have the same number of valence electrons.
D)
They have different numbers of protons, neutrons, and valence
electrons: they are all gases at room temperature.