In a uranium fission reaction, uranium splits into two smaller atoms and energy.

Where did the energy come from?

Responses

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

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

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

Chemical bonds are broken, and chemical energy is released.

Chemical bonds are broken, and chemical energy is released.