11the ans should be B.
the penetrating power of protons is
(a) greater than neutrons
(b) lesser than electrons
(c) greater than elecrons
(d) none of these
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7 Answers
11The alpha particle is a fast moving packet of two protons and two neutrons , expelled as a single particle from a disintegrating nucleus . Because alpha particles produce such heavy ionisation per centimeter of travel we would expect them to travel much shorter distances before their energy is expended. This is in fact the case; they have very little penetrating power.
Beta particles are more like electrons. Beta particles are much more penetrating than alpha particles because of their low ionisation power of travel.
49Penetrating power depends on the velocitymass for a particle...
That cannot be judged by by comparing beta-particles and alpha-particles...
This is a fact to be known! :P