Question

what is the e/m value of alpha-particle with respect to hydrogen​

Answer 1

Alpha particle is a helium nucleus which consists two protons and two electrons. It has +2 charge and the mass of four protons. So the alpha particle has the least E/M because of its large mass. You can see that its E/M is equal to 1/2 time E/M of a proton.

please mark me brain mark list

Answer 2

Alpha particle has two protons and two neutrons, e/m of alpha particle will be 1/2 times e/m of proton. so, e/m of alpha particle is 7.9 × 10-¹⁴.