# Reflectance and Absorption properties of X-rays

Are there any materials that are mostly "transparent" to x-rays? Such as glass would be to the visible spectrum?

What about materials or surfaces that reflect x-rays? Does most metal reflect x-rays?

What about materials that are mostly opaque? I know lead can absorb x-rays, but is there anything else that is healthier?

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Notice that the units of length here are $\text{g/cm}^2$ or areal density which means that the trend is much more pronounced when converted to length as higher Z materials also tend to be denser.