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www.reference.com/article/many-protons-neutrons-electrons-iron-468c62eccffa36a3

Iron has 26 protons, 26 electrons and 30 neutrons. Iron has the atomic number of 26 and the atomic symbol Fe.

www.reference.com/science/discovered-protons-electrons-neutrons-9874fd87055357be

The discoveries of electrons, protons and neutrons were made by J. J. Thomson, Ernest Rutherford and James Chadwick respectively. They were staggered over a period of 35 years.

www.reference.com/science/isotope-13-protons-14-neutrons-40dbd1f5af6573e4

The isotope with 13 protons and 14 neutrons is aluminum-14. The element of the isotope can be determined by either the number of electrons or protons, which are equal to the atomic number of an element. In the case of aluminum, it has an atomic number of 13.

www.reference.com/article/protons-neutrons-electrons-ion-83f1db79c13b278f

The protons, neutrons and electrons present in an ion are determined from a periodic table. The atomic number represents the protons in an element. The atomic mass minus the atomic number represents the neutrons. In a neutral atom, the electrons are equal to the protons.

www.reference.com/article/many-protons-neutrons-electrons-sodium-aaf54c880fb232a4

The element sodium has 12 neutrons, 11 electrons and 11 protons. The number of electrons and protons come from the element's atomic number, which is also 11. The number of neutrons can be found by subtracting the atomic number from sodium's atomic mass of 23.

www.reference.com/article/many-protons-carbon-atom-874017bee5838c14

Carbon has six protons in its nucleus, so its atomic number is six. It also has six neutrons in its nucleus and typically has six electrons as well.

www.reference.com/science/many-protons-neutrons-boron-11-9a3b659af3af1949

Boron-11 is a chemical element that has five protons and six electrons. It is an uncommon element that is rarely found in the Earth's crust or atmosphere.

www.reference.com/article/many-protons-neutrons-electrons-potassium-76842a584dda2bec

Potassium has 19 protons, 20 neutrons and 19 electrons. The charges of the protons and electrons cancel each other out, so a neutral atom of potassium has a net charge of zero.

www.reference.com/science/many-electrons-protons-neutrons-chlorine-234a0e0a26c00d57

The chemical element chlorine has 17 electrons, 17 protons and 18 neutrons. An atom, which is the fundamental unit of an element, contains an equal number of electrons and protons. The number of neutrons is calculated by subtracting the atomic number from the mass number.

www.reference.com/science/many-protons-neutrons-electrons-nitrogen-atom-4496ad00a58a0f8a

One neutral atom of nitrogen has seven protons, seven neutrons and seven electrons. This element is found in group 15 and period 2 of the Periodic Table of the Elements. It has an atomic weight of 14.007 amu.