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

The mass number for uranium-235 is in the wrong location.
The mass 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 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 11H
, not 01n
.
A neutron should be expressed as 1 to the 1th power cap h, not 1 to the 0 power n.

1 answer

The correct statement describing why the expression is incorrect is:

A neutron should be expressed as \( ^1_0 n \), not \( ^0_1 n \).

In nuclear notation, the correct way to denote a neutron includes the mass number (which is 1 for a neutron) and the atomic number (which is 0). Therefore, it should be written as \( ^1_0 n \).