What is Atom Probe Tomography? Atom Probe Tomography (APT) is a powerful analytical technique that provides three-dimensional (3D) imaging and chemical composition analysis of materials at the atomic ...

The Bohr model, introduced by Danish physicist Niels Bohr in 1913, was a key step on the journey to understand atoms. Ancient Greek thinkers already believed that matter was composed of tiny basic ...

Everything in the world is made up of atoms. The structure of the atom is what gives an element its chemical and physical properties. Negatively charged particles that spin around the positive centre ...

A dot and cross diagram for sodium chloride suggests that it is made up of pairs of sodium and chloride ions. It is not. A 3D construction model shows how the ions are arranged in a lattice structure.

Scientists at Caltech have developed a revolutionary technique that enables the creation of metallic objects with precisely specified shapes and compositions, allowing unprecedented control over metal ...