The metal iridium has an FCC crystal structure. If the angle of diffraction for
the {220} family of parallel planes occurs at 69.22? (first-order reflection) when
monochromatic x-radiation having a wavelength of 0.1542 nm is used,
compute
(a) the interplanar spacing for this set of planes, and
(b) the atomic radius for an iridium atom

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

Write a brief passage describing a neutral atom of nitrogen-14 (n-14). describe the number of protons, neutrons, and electrons in the atom, where each type of particle is located, and how the terms atomic number, mass number, and atomic mass are related to the particles. use the periodic table to you. 14 protons and eletrons since its a neutral atom

Asa choose the correct set of reaction coefficients to properly balance the following chemical equation according to the law of conservation of mass: __s8 + __o2 ==> __so2 1, 1, 8 1, 8, 1 1, 8, 8 8, 1, 1