Question

e/m ratio of alpha particles alpha mass no. 4 atomic no. 2
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Answer 1

Answer:

4.8×107C/kg

Explanation:

For electron

Charge on an electron =1.6022×10−19coulombs

mass of an electron =9.109×10−31g

So charge to mass raio will be =1.6022×10−19C/9.109×9.109×10−31kg

=1.78×1011C/kg

For alpha particle

charge = 2 protons =2×1.6022×10−19coulombs

mass = mass of 2 protons + mass of 2 neutrons

=4×1.672×10−27kg

The charge of mass ratio e/m =2×1.6022×10−19C/(4×1.672×10−27kg=4.8×107C/kg

Answer 2

Answer:

4.8×107C/kg

Explanation:

For alpha particle

charge = 2 protons =2×1.6022×10−19coulombs

mass = mass of 2 protons + mass of 2 neutrons

=4×1.672×10−27kg

The charge of mass ratio e/m

=2×1.6022×10−19C/(4×1.672×10−27kg=4.8×107C/kg