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

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.