In 1913, Henry Moseley did an experiment to prove that the atomic number was not the nuclear charge but that the atomic number is just one unit away from the effective nuclear charge. This experimental work ended up in the design and development of the Bohr model, a quantum-limited atomic model in 1913. In The Bohr’s Model, a nucleus with the atomic number being the positive charge is in the center of an the same number of electrons, moving around it to form a set of orbital shells. The