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www.reference.com/science/many-neutrons-carbon-cb9bd09d2084f48c

Most carbon atoms have six neutrons. Although carbon is defined as having six protons, the number of neutrons in a carbon nucleus can vary, which gives rise to the various isotopes of carbon. Fifteen isotopes of carbon, ranging from two to 16 neutrons, have been observed by scientists.

www.reference.com/article/neutrons-bf340beaa3c48c3d

Neutrons are always found within the atom's nucleus. They are one of the three main building blocks on an atom, along with protons and electrons. Each type of element has a specific number of each of these building blocks, which can easily be determined by consulting the periodic table of elements.

www.reference.com/article/many-neutrons-oxygen-743d8d7f4751785f

Oxygen has 8 neutrons, 8 electrons and 8 protons, making it a neutral element. Neutral elements have the same number of neutrons and protons. Oxygen is the eighth element in the periodic table of elements, with an atomic number of 8.

www.reference.com/science/many-neutrons-hydrogen-33208cef42ccbd34

Hydrogen has no neutrons, just a single proton and a single electron. Most of the mass of an atom lies in its protons and neutrons; hydrogen has a mass of 1 because of the mass of its single proton.

www.reference.com/article/many-neutrons-iron-49b4149dd46e73c3

The number of neutrons in an atom of iron is variable, with the most common number being 30. While the number of protons is diagnostic of an atom and does not change without changing the element itself, the number of neutrons varies by isotope.

www.reference.com/article/many-neutrons-silver-7950d535a673f966

Silver has 61 neutrons, 47 protons and 47 electrons. The chemical symbol Ag represents silver, stemming from the Latin word "argentum." It has an atomic number of 47.

www.reference.com/article/many-neutrons-nitrogen-38c7adc7294af1b1

Nitrogen has seven neutrons. It is element number seven, which means that the atom also has seven electrons and seven protons. Nitrogen has an atomic weight of 14 grams per mole.

www.reference.com/article/many-neutrons-aluminum-a6329394b368f987

Aluminum has 14 neutrons, 13 electrons and 13 protons. Aluminum is a silvery-white metal. Its density is 2.70 grams per cubic centimeter. Its boiling point is 4,566 degrees Fahrenheit, and its melting point is 1,220.58 degrees Fahrenheit.

www.reference.com/article/many-neutrons-copper-ee38722f6a174da3

Copper has 35 neutrons. Because its atomic number is 29, copper also has 29 protons and 29 electrons. Copper is a metal and is a member of group 11 on the periodic table.

www.reference.com/science/many-neutrons-sodium-9ef67e0d1dbf0c86

The element sodium has 12 neutrons. The element also has an atomic number of 11, meaning that it has 11 electrons and 11 protons. It has an atomic mass of 22.9, which is often rounded up to 23 to accurately determine the number of neutrons in the element.