What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?

Q.

What is the usual symbol for (a) an electron (b) a proton, and (c) a neutron?

Q. What is the symbol for an atom containing $20$ protons and $22$ neutrons?

Q. Give in detail about electron, proton and neutron on the following points:
(a) Chemical symbol
(b) Charge
(c) Name of Discoverer.

Q. If a species has 16 protons, 18 electrons and 16 neutrons, the symbol (with charge) of species is:

Q.

An atom of phosphorus has the symbol
$3115P$. Give the number of protons, neutrons and electrons in an atom of phosphorus.

Number of protons __(A)___.
Number of neutrons __(B)___ .
Number of electrons __(C)___ .