Science

You're right. It is confusing but thanks for trying to explain. I can't answer BECAUSE the atomic number of Rn is 86 or perhaps that IS the answer. The equation isn't balanced because the number 80 should be 86. If it were 86 the equation would balance. Here is what you can do on the computer that makes more sense. Technically it isn't quite correct BECAUSE the atomic mass is the superscript on the left and the atomic number is the subscript on the left. The best I can do is this if I understand what you've done:
₈₀²¹⁹Rn but to make those subscripts and superscripts isn't easy to do PLUS we have the Po AND the alpha. Here is a shortcut that isn't quite right but it is easier to do. We place the subscript on the left next to the element and we place the superscript ON THE RIGHT but we just understand it should be on the left. That makes it easier to read like this.
80Rn219 ==> 84Po215 + 2He4
Now the subscripts must add up on both sides; the superscripts must add up on both sides. See 80 = 84 + 2==NO.
219 = 215 + 4 = yes.
So I think the way the question is worded makes that 80 incorrect and that doesn't add up . If we use 86 the correct radioactive equation would look like this.
86Rn219 ==> 84Po215 + 2He4

Number 2 doesn't look like a fusion reaction to me. Perhaps I don't understand the equation you wrote. If you would like to rewrite and repost using the technique I've show above, please feel free to do so.