Two different sub-atomic particles are described below:
Particle X: No charge
Particle Y: Outside the nucleus
Which statement is true?
a X is a neutron and Y is an electron.
b X is a neutron and Y is a proton.
c X is a proton and Y is an electron.
d X is an electron and Y is a proton.
The correct answer is:
c) X is a proton and Y is an electron.
A neutron is a sub-atomic particle that has no charge, so X is not a neutron.
An electron is a sub-atomic particle that is found outside the nucleus, so Y is an electron.
A proton is a sub-atomic particle that has a positive charge, so X is a proton. Therefore, statement c is true.