There's growing evidence ...Fentanyl (or hydromorphone) have a better side effect profile than morphine (remember the vaunted vasodilation is only a side effect) thereby making fentanyl a better choice..
The subatomic particles in the nucleus of a carbon atom are protons and neutrons. The atomic nucleus contains protons and usually neutrons (except for hydrogen-1 (protium) atoms. The number of protons is an element's atomic number and is the same for all atoms of an element. Carbon has atomic number #6#. So all atoms of carbon have #6# protons in their atomic nuclei.
Protons-The subatomic particle found in the atom's dense central core that has a positive charge. Neutrons-The subatomic particle found in the atom's dense central core that has no charge. Electrons-The subatomic particle found outside the atom's dense central core that has a negative charge.