Question

Potassium and nickel are in the same row of the periodic table. What do these elements have in common?(1 point) Responses They have similar reactivity. They have similar reactivity. They have the same number of electron shells. They have the same number of electron shells. They have the same number of valence electrons. They have the same number of valence electrons. They have similar physical properties.

Answer 1

Potassium (K) and nickel (Ni) are indeed in the same row (period) of the periodic table, specifically in Period 4. The correct response to what they have in common is:

They have the same number of electron shells.

Both potassium and nickel have four electron shells, but they do not have similar reactivity, the same number of valence electrons, or similar physical properties. Potassium is an alkali metal, while nickel is a transition metal, leading to significant differences in their chemical behavior.