Help needed ASAP, I will mark your answer as brainliest.

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Do not include the unexpected results