Atoms lose their neutrality when electrons are either lost or gained. Atoms that have lost or gained electrons are called ions. Neutral atoms have the same number of protons, neutrons and electrons. More » Science Chemistry Atoms & Molecules

An atom smasher is a large installation commonly referred to as a particle accelerator. It works by accelerating electrons to a significant fraction of the speed of light and then crashing them into the nuclei of atoms. ... More »

An atom is comprised of a central portion called a nucleus that contains protons and neutrons. Electrons orbit the nucleus and are typically found in a one-to-one ratio with protons. Different stable atomic configuration... More »

One neutral atom of sodium has 11 electrons. A sodium ion has 10 electrons. More »

A nitrogen atom's appearance consists of a nucleus that's surrounded by one orbital containing two electrons and a second orbital containing five electrons. The total number of electrons in one atom of nitrogen can be de... More »

An atom that has gained one or more electrons is called an anion. It is also known as a negative ion. A positive ion, or a cation is one that has lost one or more electrons. More »

A polar molecule is characterized by the uneven distribution of the electrons that form the covalent bonds between each atom in the molecule, resulting in a slightly positively charged side and a slightly negatively char... More »