ionization potential

20 LETTERS · STARTS WITH I

ionization potential is a valid 20-letter word worth 30 points in Scrabble and 35 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1O1N1I1Z10A1T1I1O1N1P3O1T1E1N1T1I1A1L1

1 + 1 + 1 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =30 PTS

DOUBLE WORD → 60TRIPLE WORD → 90

MEANING

What does ionization potential mean?