Select all that apply. Use electron configurations to explain why the ionization energy for calcium is greater than that for potassium. Calcium has one more proton than potassium. Potassium has one more proton than calcium. Higher positive charge attracts electrons. Lower positive charge attracts electrons.

How is it possible for someone to put an ear to a wall and hear someone in the next room?     a.sound waves can travel though solids.    b.the waves travel from room to room via air.    c.there must be some air in the wall so the sound can travel through it.    d.sound waves change to electromagnetic waves and then back again.