. A radioactive source emits three type of radiations.


A radioactive source emits three type of radiations.

(a) Name the radiation of zero mass.

(b) Name the radiation which has the lowest ionising power.

(c) Name the radiation which has the lowest penetrating power.

(d) Give the charge and mass of particles composing the radiation in part (c).

(e) When the particle referred to in part (c) becomes neutral, it is found to be the atom of model of its neutral atom.

(f) From which part of the atom do these radiations come?

Best Answer

(a) The radiation which has zero mass are gamma radiations
(b) Gamma radiations has the lowest ionizing power
(c) Alpha radiation has the lowest penetrating power
(d) Alpha particles has positive charge = 3.2 × 10-19 C and rest mass = 4 times the mass of proton i.e., 6.68 × 10-27 kg
(e) The name of the gas is helium
2p
(f) These radiations come from the nucleus of an atom
 

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