What do an orgasm, a multiplication problem and a photo of a dead body have in common? Each induces a slight, irrepressible expansion of the pupils in our eyes, giving careful observers a subtle but meaningful signal that thoughts and feelings are afoot. For more than a century, scientists have known that our pupils respond to more than changes in light.
Review. 1  Atoms have their electrons arranged in layers called shells. 2  In order to maintain electrical balance the number of electrons is equal to the number of protons in most elements.
1.You get the number of protons and electrons from the atomic number (number on top of element symbol). 2. You find the number of neutrons in one particular isotope of an el â¦ ement by subtracting the atomic number with the isotope mass number, (number behind the isotope's name). For complete explanation: cf.he number of electrons in an element can change. For a neutral atom (net charge of zero), the number of protons is exactly equal to the number of electrons. So the number of electrons is also the same as the atomic number. However, it is possible to remove electrons and not change the identity of an element.