Question

In a uranium fission reaction, uranium splits into two smaller atoms and energy. Where did the energy come from?

A. Chemical bonds are broken, and chemical energy is released.

B. When the uranium splits, mass and energy are created making the two new atoms.

C. Some of uranium's mass is converted into energy, so the smaller atoms have less mass.

D. The energy had to be the kinetic energy of the atom of uranium before it split.

I know its not B or A because I got them wrong...;-;! I'm thinking its D now...

Answer 1

The answer is C: Some of uranium's mass is converted into energy, so the smaller atoms have less mass. I took the test

Step-by-step explanation:

Answer 2

Answer: C. Some of uranium's mass is converted into energy, so the smaller atoms have less mass.

Explanation:

From Einstein's mass-energy relation:

E = mc²

Mass and energy are equivalent. Mass can be converted into energy and energy into mass.

When Uranium atoms under go nuclear fission, smaller atoms are formed and huge amount of energy is released. This energy comes from the mass difference of the uranium nuclei and new nuclei formed. This mass converted into energy according to Einstein's equation.