The atomic number above the element is the number of protons inside of it.
That’s number 1 so answer is 169.
Number 2 is H because in the description above it states it is highly reactive
Weird that the only choices are given as integrals with respect to

. (Integration along the

axis would be way easier, but whatever)
The fourth option should do it.
My boiii, tiger algebra helped me out a little on this one, I got 7c * sqrt(5)
Seven because 1+2 is 3 and 3+1 is 4 so in total is seven