<prompt> After emitting an a particle, what will happen to daughter nucleiMass number increases by 4Mass number decreases by 4Atomic number increases by 4Atomic number decreases by 4  <response>: Ans: b Mass number decreases by 4 Ref: Grainger and Allisons radiology, 4th ed, 139; Park, 19th ed, p. 600Charge of an alpha particle is 2 and mass is 4 units. Source of alpha particle is nucleus.PropertyabgX-raysNature2He4 or 2a4Charge 2 mass 4 unit-2ebCharge -1Mass almost zero.0g0No charge no massElectromagnetic waves, no chargeSourceNucleusConsists of electron of nuclear originHigh frequency radiation having highKinetic energy.Produced when a beam of high speed cathode rays strike tungsten target.Penetrating powervariableIonizing or damaging power10,000 x100 xX-Frequency and wavelength are inversely related.Neutrons are uncharged particles with variable penetration power.Alpha particles are positively charged heavy particles with less penetrating power.X-rays are electromagnetic waves which are generated when a beam of high speed cathode rays strike the anode. 