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A particle which is four times in mass and two times in charge that of proton is

  • A.Helium atom
  • B.An alpha particle
  • C.Deuteron
  • D.Tritium

Answer: B

This is an alpha particle.

It has a mass of 4 units and a charge of \(+2\), being a helium nucleus of two protons and two neutrons. A helium atom has the same mass but no net charge, and a deuteron has mass 2 and charge \(+1\).

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