The term "atomic radius" is not particularly helpful although its use is widespread. Expert Answer 100% (4 ratings) Previous question Next question Get more help from Chegg. It has a melting temperature of 1875 C. The electronic configuration for chromium is: (Ar)(3d) 5 (4s) 1, and it has an atomic radius of 0.130 nm. The chemical symbol for Hydrogen is H.. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. 1000 pm = 1 nanometre (nm, nanometer) Neutral radii. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. The size of neutral atoms depends upon the way in which the measurement is made and the environment. The atomic radius of a chemical element is the distance from the centre of the nucleus to … Follow the appropriate hyperlinks for definitions of each radius type. At room temperature Chromium has a bcc (body-centered-cubic) crystal structure with a basis of one Cr atom. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Answer to Chromium (Cr) has a BCC crystal structure, an atomic radius of 0.1249 nm, and an atomic weight of 51.99 g/mol. Chromium is a metal in group VIB of the periodic table with atomic number 24, an atomic weight of 51.996, and a density of 7.19. If the atomic radius of chromium is 0.125 nm, calculate the volume of its unit cell in cubic meters.