Ion
An electron
an equal number of protons and electrons, which are positively and negatively charged respectively. The positive charge of the protons cancels out the negative charge of the electrons, resulting in an overall neutral charge for the atom.
The nuclear particle that has about the same mass as a proton but no electrical charge is called a neutron. Neutrons are found in the nucleus of an atom along with protons and contribute to the atomic mass of the atom.
A neutron does not have an electrical charge. It is electrically neutral, hence its name.
The name given to the electrical charge on an ion is a oxidation number. The charge of the ion typically formed by strontium is 2 plus.
The unit of electrical charge is the coulomb, a special name given to an ampere second.
Proton
The part of the atom that has a negative charge is the electron. Electrons are located in the electron cloud surrounding the nucleus of an atom and contribute to the atom's overall negative charge.
The subatomic particle in an atom that has no charge is called a neutron. Neutrons are found in the nucleus of an atom along with protons, which have a positive charge, and electrons, which have a negative charge.
A neutron is a part of the atom that has a Neutral charge so to say. The atom is composed of an electron, proton, and neutron. Electrons have the negative charge, Protons have a positive, and neutron has no charge. Remember it as in "Neutron is neutral" or "neutron is no". A free neutron (outside of an atom that is) has a half-life of less than 15 minutes.
An ion.
Neutron