9. Quantum Mechanics

Which of the following statements is true for an electron with principal quantum number n = 4?

Which statement best describes the relationship between the principal quantum number n, the energy of an orbital, and its average radius in a hydrogen atom?

Which of the following orbitals cannot exist according to the rules for the principal quantum number n and the angular momentum quantum number l?

How many electrons are in the n = 3 shell of a magnesium ion (Mg²⁺)?

Given n = 2, which of the following quantum numbers is NOT possible for an electron in this shell?

How many sublevels are present in the principal quantum number n = 3 energy level?

How many different orbitals in an atom have a principal quantum number n = 3?

In the hydrogen atom, the principal quantum number n specifies the energy level of an electron. If an electron originated from the third energy level before making a transition, what is the value of n for its initial state?