A mixture of iron and an unknown material is bombarded with
A mixture of iron and an unknown material is bombarded with electrons. The wavelength of the {\rm{K}}_\alpha lines are 194 \rm pm for iron and 229 \rm pm for the unknown. What is the unknown material (use chemical symbol)?
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a mixture of iron and an unknown material is bombarded with electrons the wavelength of the rmkalpha lines are 194 rm
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