Question

Which statement does not explain the placement of elements in a group together?

• A. They tend to have the same number of valence electrons.
• B. They tend to have a similar oxidation number.
• C. They tend to have the same electronegativities.
• D. They tend to have the same chemical reactivity.

Answer 1

The correct option is C

They tend to have the same electronegativities.

The elements in a group are placed together because they tend to have the same number of valence electrons, similar oxidation number, same chemical reactivity and have the same charge when they form ions.