<li> As the atomic number of the elements used as targets in an x-ray tube increases, the wavelength of the x-rays:</li>
</ol>
<p>A increases </p>
<p>B decreases </p>
<p>C remains the same </p>
<p>D sometimes increases, sometimes decreases </p>
<p>it’s B and i dont get it :(</p>
<p>Well, remember the formula for wavelength? ( believe it to be wavelength = h/p (planck's constant / momentum)
momentum = mass * velocity</p>
<p>So as either your mass or you velocity increases, your wavelength gets smaller.
As your atomic number increases in the periodic table, so does the atomic mass. So mass goes up, momentum up, wavelength down.</p>