Web Results

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/article/masses-protons-neutrons-compare-b54abdf8a1b9f152

A neutron has a slightly greater mass than a proton. According to Dick Plano, professor emeritus of physics at Rutgers University, there are many hypotheses for the mass difference, but a universally accepted hypothesis does not exist.

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.

www.reference.com/article/sum-protons-neutrons-de9a56d4529a4c95

The sum of protons and neutrons is the mass number. The mass of an atom is contained mainly within the nucleus where the protons and neutrons live. An electron's mass does not contribute significantly to the mass of the atom.

www.reference.com/science/many-protons-neutrons-aluminum-e6d60112a18483c8

One atom of aluminum has 13 protons and 14 neutrons. Protons are the positively charged particles in an atom, while neutrons are subatomic particles that have no charge.

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/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.