A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as 01n+235 92U. Which statement describes why the expression is incorrect?(1 point)

Responses

A neutron should be expressed as 11H, not 01n.
A neutron should be expressed as 1 to the 1th power cap h, not 1 to the 0 power n.

The atomic number for uranium-235 is in the wrong location.
The atomic number for uranium-235 is in the wrong location.

A neutron should be expressed as 10n, not 01n.
A neutron should be expressed as 0 to the 1th power n, not 1 to the 0 power n.

The mass number for uranium-235 is in the wrong location.
The mass number for uranium-235 is in the wrong location.

1 answer

The correct statement that describes why the expression is incorrect is:

A neutron should be expressed as \( ^1_0n \), not \( ^1_1n \).

This indicates that it was incorrectly labeled as \( ^0_1n \) instead of the correct representation, which is \( ^1_0n \). In this notation, the superscript represents the mass number (1 for a neutron), and the subscript represents the charge (0 for a neutron). The expression you provided appears to reverse the usual notation for a neutron.