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  1. Element ²³⁴U has 92 protons and 234 nucleons in its nucleus. It decays by
  2. In Moseley’s law √ν=a(z-b), the values of the screening constant for K-series
  3. The frequency of a light wave in a material is 2 x 10¹⁴ Hz and wavelength is 5000Å.
  4. A wire in the form of a circular loop of one turn, carrying a current, produces
  5. A series L-C-R circuit contains inductance 5 mH, capacitance 2 μF and resistance