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www.reference.com/article/charges-protons-neutrons-electrons-77a5919012729443

Atoms have positive protons, no charge neutrons and negative electrons. The positive and the negative describes the charge of the atom.

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/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/article/many-protons-neutrons-electrons-oxygen-e90b31e6aa4de315

A single oxygen atom has eight protons, eight neutrons and eight electrons. The number of protons and electrons of an element are equal to its atomic number, which is eight for oxygen. The number of neutrons can be calculated by subtracting the number of protons from the atomic mass, which is 16 min

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/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-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/protons-neutrons-called-323cad9b6059c758

Collectively, protons and neutrons are called nucleons. Along with electrons, they make up the three subatomic particles in an atom.

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/element-20-protons-20-neutrons-b8ad5f445064d314

Calcium has 20 protons and 20 neutrons. This element is number 20 on the Periodic Table of the Elements and has an atomic weight of 40.078.