ANSWER
A neutron has a positive charge and has a mass of 1 amu
option B
Step-by-step explanation
Atom is defined as the smallest indivisible particle of an element that can take part in a chemical reaction and still retake it chemical properties
The sub-atomic particles are electron, proton and neutron
Below is the atomic structure of a substance
In the structure above, the inner red circle is called the nucleus and it house a positive charge called proton and a neutral atom called the neutron.
The green circle revolving around the big black circle is called the electron.
The proton is positively charged, the electron is negatively charged and the neutron is a neutral atom.
Therefore, the description that is not correct about the sub-atomic particles is neutron has a positive charge and has a mass of 1 amu
Hence, option B is the correct answer