How big is a hydrogen atom? The radius of a hydrogen atom is known as the Bohr Radius, which is equal to . 529 × 10-10 meters. That means that a hydrogen atom has a volume of about 6.2 × 10-31 cubic meters.Click to see full answer. Hereof, what is the size of a hydrogen atom? 120 pm Similarly, are atoms 99.99 empty space? Everything around us is made up of atoms, tiny particles composed of a nucleus orbited by electrons. These tiny particles are filled with energy, but they have quite a bit of empty space. In fact, 99.9999999 percent of all of the matter around us is empty space. Accordingly, what is the width of a hydrogen atom? Question: A hydrogen atom has a diameter of approximately 1.06×10−10 m 1.06 × 10 − 10 m , as defined by the diameter of the spherical electron cloud around the nucleus. The hydrogen nucleus has a diameter of approximately 2.40×10−15 m 2.40 × 10 − 15 m .What is the diameter of a hydrogen molecule?The diameter of a hydrogen atom in its ground state is around 1 x 10-8 cm, so the ratio of the diameters is about 1.6 x 10-5, which makes the ratio of the volumes 4.1 x 10-15. The volume occupied by the electron is all but a tiny fraction of the volume of the atom, while 99.95% of the atom’s mass is in the proton.