Lead-207 has 82 neutrons. It is a stable isotope of lead. Because it is non-radioactive, it does not have a half life. It is used in medical and scientific applications. More »

Lead has 125 neutrons. It also has 82 electrons and 82 protons, and its atomic symbol is Pb. Lead is a metal that has been known since ancient times. More »

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. More »

The element argon contains 22 neutrons. The number of neutrons an element has is determined by subtracting the number of protons from the element's atomic weight. More »

The isotopes of an element differ from each other in their mass numbers and the number of neutrons they contain. All of the isotopes of an element, however, contain the same number of protons, which is equal to that elem... More »

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. More »

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Hydrogen is the only element that does not contain any neutrons in its nucleus. Hydrogen is comprised of one proton and one electron. It is a diatomic molecule, which means that it typically exists as two hydrogen atoms ... More »