Neon (Ne), Argon (Ar), and Krypton (Kr), are in the same column on the periodic table of the elements. What characteristic do these elements
have in common?
A. atomic mass
B. negative electrical charge
C. number of neutrons
D. full valence electron shells

Ne, Ar, and K have full valence electron shells. Thus, option D is correct.

The periodic table has been consisted of metals, nonmetals, and metalloids. The elements in the periodic table have been arranged with the increasing number of valence electrons from left to right of the periodic table.

Ne, Ar, and K have been consisted in the last column of the periodic table and are noble gases. The elements are least reactive with the complete outer octet of the electronic configuration.

Thus, Ne, Ar, and K have full valence electron shells. Thus, option D is correct.

For more information about the periodic table, refer to the link:

link

Explanation:

Neon, Argon and Krypton are in the same Group on periodic table they contain full valence electron shells in common.

Therefore,

Option D is correct ✔.

b) mutualism

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