Hydrogen does not have neurons. Neurons are specialized cells found in the brain and nervous system of animals, not in elements like hydrogen.
Animals capable of empathy possess mirror neurons, like humans.
Chlorine does not have neurons as it is a chemical element and not a living organism. Neurons are specific to the nervous system of animals.
The brain has two kinds of cells, neurons and glial cells. So if the brain did not have neurons it could still have glial cells, but they have no function in the absence of neurons. You would, in effect, have converted the brain into a tumor. Human beings cannot live without a brain. (Nor any irrational animals) We wouldn't be animals, we would be stupid zombies.
Striped muscular cells with sacromeres and motor neurons.
sensory neurons
Sensory Neurons
Sensory neurons and neurons are connected by Interneurons.
Afferent Neurons
Interneurons or association neurons.
Motor neurons and intern neurons
The neurons form the bodies nervous system.