Chapter U1.15, Problem 6E

Interpretation Introduction

Interpretation:

This is to be explained that an alpha particle is not a neutral atom and it has two units of positive charge.

Concept introduction:

Alpha particle is known as doubly ionized Helium nuclide and it is represented as follows:

${}_2^4{\text{He}}^{2+}$.

Answer to Problem 6E

Due to the removal of two electrons from the neutral helium atom, the alpha particle is not a neutral atom rather than a particle with two units of positive charges.

Explanation of Solution

An alpha particle has two protons and two neutrons. There is no electron to balance the positive charge of two protons. Thus, alpha particle is not a neutral atom but a doubly ionized helium nuclide ${}_2^4{\text{He}}^{2+}$.

Conclusion

Alpha particle has two protons but no electrons. Thus, it is not neutral.