Answer:
x = 215
Step-by-step explanation:
15^2-13=x-3
225 - 13 = x - 3
212 + 3 = x - 3 + 3
215 = x
A chlorine nucleus will contain: Number of protons Z = 17. Number of protons + neutrons A = 35. Number of neutrons N = 35 - 17 = 18.
A red block is 2 ounces and a green block is 4. This would make the answer 6 for the total weight of one of each block.
