Charge q is 1 unit of distance away from the source charge S. Charge p is two times further away. The force exerted between S and q is the force exerted between S and p.
O 1/2
O 2 times
O 1/4
O 4 times

1/4

Explanation:

i'm assuming that the correct answer is indeed the first one/ "a"..

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer