Which particles in an atom could demonstrate that opposite charges attract?
A.
a neutron and an electron
B.
two protons together
C.
a proton and a neutron
D.
a proton and an electron

The correct answer is D

Choice D. a proton and an electron.

Explanation:

Each proton carries a positive charge of unit.

Each electron carries a negative charge of unit.

As their name suggests, neutrons are neutral. They do not carry any electrostatic charge. Because of that, neutrons can't attract or repel neutrons or protons with electrostatic forces.

On the other hand, electrons and protons carry opposite charges. Therefore, an electron and a proton would attract each other electrostatically.

However, since protons are all positive, two protons would repel each other electrostatically.

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

true tan speed = ang vel x radius