Question

Which of the following best predicts the outcome of a fission reaction involving uranium-235?

Two U-235 atoms form bonds with each other, absorbing a large amount of energy.
An atom of U-235 absorbs electrons, undergoes an increase in energy level, and splits into fragments.
The nuclei of two U-235 atoms join together to form a heavier uranium isotope, and energy is released.
The nucleus of an atom of U-235 splits, resulting in two smaller fragments and the release of a large amount of energy.

Answer 1

The nucleus of an atom of U-235 splits, resulting in two smaller fragments and the release of a large amount of energy

Step-by-step explanation:

In the fission reaction U-235 absorbs one neutron and breaks into two new atoms (also known as fission fragments) and three neutrons with the release of massive amount of energy.

The nuclear fission reaction is as follows:

¹₀n + ²³⁵₉₂U → ¹⁴¹₅₆Ba + ⁹²₃₉Kr + 3 ¹₀n

U-235 has a half life of 703.8 million years. In the fission reaction massive amount of energy 202.5 MeV is released.

Answer 2

The correct option is this: THE NUCLEUS OF AN ATOM U-235 SPLITS, RESULTING IN TWO SMALLER FRAGMENTS AND THE RELEASE OF A LARGE AMOUNT OF ENERGY.
The process of nuclear fission involves the splitting of a nucleus of a radioactive element into two smaller nuclei of different elements accompany with a large release of energy. The energy released during nuclear fission is usually used to generate electricity power.