According to Dalton, an atom may be defined as the smallest part of matter that can be take part in a chemical reaction.
However, protons have a charge of +1, and neutrons are uncharged. In 1803, Dalton put forward a theory which explained the composition of matter.
A beryllium atom has 4 protons, 5 neutrons, and 4 electrons. If the atoms of a material are ordered in a repeated array throughout, the structure will be an ordered three-dimensional pattern. Take this chemistry quiz to test yourself about atomic structure, including nuclear structure and electron configuration. The atomic or molecular structure of solid materials can generally be found in two states: ordered and disordered. The number of protons in an atom determines. Atomic Structure, Electron Configuration, Oxidation, and More. \( \newcommand\): Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus. All other elements have the same basic structure: protons and neutrons at the center, and electrons orbiting around.