question_answer

Write down the value of charge and mass of an \[\alpha \] -particle. Express charge in terms of electronic charge and the mass in terms of the mass of a proton. Can an \[\alpha \] -particle be compared with a helium atom?

Answer:

                Charge on \[\alpha \] -particle \[=2e\] \[=\text{ 2 }\times \] Charge on an electron\[=\text{ 3}.\text{2 }\times \text{ 1}{{0}^{-19}}\text{C}\]. Mass of \[\alpha \]-particle \[=4{{m}_{P}}=4\times \] Mass of proton\[=\text{ 4}.00\text{26}0\text{ amu}\]. An \[\alpha \] -particle is a doubly ionised helium atom i.e., it is a helium nucleus.