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.
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 observe...
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.
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.
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.
An atom of oxygen contains eight neutrons. A neutron is one of the particles that make up matter, which is any substance that takes up space. Neutrons are fundamental particles, meaning that they cannot be broken down.
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.