Fill in the orbital energy diagram for the oxide ion.

Iknow #2 is d. i just need to know why

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.