Question

Number the elements sodium, magnesium, and potassium in the predicted order of ionic radius from the largest (1) to the smallest (3).


sodium - 2

magnesium -3

potassium- 1

Answer 1

Mg<Na<K

dif groups, bigger number , bigger r

same group, as you move to the right, r get smaller

bonus: same box for example you compare na+ vs Mg2+, e are the same then count the atomic number, Mg has more Protons, smaller r cuz it more attractable

Answer 2

Thank you so much!! It was correct