238/92 U → 4/2 He + 234/90 blank
Fill in the blank
The element in the missing box is ____. (Use the symbol from the periodic table, not the whole name.)
1 answer
The element in the missing box is Th (Thorium).
Fill in the blank
The element in the missing box is ____. (Use the symbol from the periodic table, not the whole name.)
1 answer