The collisions will happen under enough heat and pressure to melt protons and neutrons and release their components (quarks ...

The word magic is not often used in the context of science. But in the early 1930s, scientists discovered that some atomic ...

The question of where atoms come from requires a lot of physics to be answered completely – and even then, physicists only have good guesses to explain how some atoms are formed.

Explain to students that in a hydrogen atom, the negatively charged electron is attracted to the positively charged proton. This attraction is what holds the atom together. Tell students that hydrogen ...

An atom consists of a heavy center, called the nucleus, made of particles called protons and neutrons. An atom has lighter particles called electrons that you can think of as orbiting around the ...

When Israeli aircraft recently struck a uranium-enrichment complex in the nation, Iran could have been days away from ...

Explore ETH Zurich’s cutting-edge experiments on fundamental forces and dark matter. Click to read the full story now ...

Chadwick discovers the neutron 1932. For four years, ... For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass, ...

Because the mass of a proton is equivalent to a neutron, the relative mass of an atom is the same as its nucleon (mass) number. Neutrons have no charge. Protons are positively charged.