Scientists at Ames Lab have developed solvent-free techniques to synthesize alkali metal hydrides. Which of the following techniques do they use to unambiguously determine that the hydrogen atoms have bound to the metal?

W) Gravimetric analysis

X) Infrared spectroscopy

Y) UV/Vis spectroscopy

Z) Solid-state NMR spectroscopy
Z) SOLID-STATE NMR SPECTROSCOPY