Question

Statement 1: The cation energy of an electron is largely determined by its principal quantum number.
Statement 2: The principal quantum number n is a measure of the most probable distance of finding the electron around the nucleus.

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$.
• B. If both Statement $1$ and Statement $2$ are true but statement $2$ is not the correct explanation of the statement $1$.
• C. If Statement $1$ is true but Statement $2$ is false.
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (A)

We know that principal quantum number represent the main energy level or energy shell. Since each energy level is associated with a definite amount of energy, this quantum number determines to a large extent the energy of an electron. It also determines the average distance of an electron around the nucleus. Therefore both statement $1$ and statement $2$ are true and the statement $2$ is a correct explanation of the statement $1$.