Compared to `alpha`- particles with the same energy. `beta` particles can much more easily penetrate through matter why is this?

The alpha particle is same as

alpha -particles and beta -particles

alpha -Particles can be detected using

The ionising power of alpha- particle is less compared to alpha- particles but their penetrating power is more. The mass of beta- particle is less than the mass of alpha -particle.

Why alpha particles have high ionising power than beta rays?

A proton and an alpha particle are projected in a magnetic field which exists in the width of region d. Compare the angles of deviation suffered by the proton and the alpha particle if before entering the magnetic field both the particles. a. have the same momentum, b. have the same kinetic energy, and c. are accelerated through the same potential difference. Take m_alpha = 4 m_p, q_alpha = 2 q_p.