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 ne... More » Science Chemistry Atoms & Molecules

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 » Science Chemistry Atoms & Molecules

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 block... More » Science Biology Cells

An ion has an electrical charge because it either has more electrons than protons or it has more protons than electrons. Electrons, which are found in the shells of an atom, have a negative charge, while protons, found i... More »

The three types of subatomic particles are protons, neutrons and electrons. Protons and neutrons live together in the nucleus and are called nucleons. Electrons orbit the nucleus in orbitals. More » Science Chemistry Atoms & Molecules

All isotopes of the same element share a common number of protons and electrons, though they vary in their relative numbers of neutrons. All isotopes of a given element are chemically identical, and they form bonds with ... More »

Atoms are made of protons, neutrons and electrons with the exception of hydrogen atoms, which do not have any neutrons. The nucleus of an atom contains the protons and neutrons, and the electrons are found outside the nu... More »