Hydrogenic Atoms and Periodic Table Organization

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What is the principal quantum number of an electron in the 3s orbital?

4

2

1

3 (correct)

Which quantum number describes the shape of an atomic orbital?

Magnetic quantum number

Principal quantum number

Azimuthal quantum number (correct)

Spin quantum number

In a hydrogenic atom, how many degenerate orbitals are present in the n=3 energy level?

5

3

9 (correct)

1

What is the maximum number of electrons that can occupy the 2p subshell?

6 Signup and view all the answers

Which of the following sets of quantum numbers is not allowed for an electron in an atom?

n=1, l=0, m_l=1, m_s=+1/2 Signup and view all the answers

In the Bohr model of the hydrogen atom, what happens when an electron transitions from a higher energy level to a lower energy level?

It emits a photon with energy equal to the energy difference between the levels Signup and view all the answers

Which of the following statements about the principal quantum number (n) is correct?

It determines the energy of the bound electron Signup and view all the answers

For a hydrogenic atom with atomic number Z = 2, what is the energy of the electron in the n = 3 energy level?

-$\frac{R}{27}$ Signup and view all the answers

Which of the following statements about the orbital angular momentum quantum number (l) is correct?

It specifies the magnitude of the orbital angular momentum Signup and view all the answers

Which of the following statements about the magnetic quantum number (ml) is correct?

It labels the orientation of the orbital angular momentum Signup and view all the answers

Which of the following statements about hydrogenic atoms is incorrect?

The energy levels are independent of the atomic number (Z) Signup and view all the answers

Which of the following statements about the wavefunctions of a hydrogenic atom is correct?

They are uniquely labeled by a set of three quantum numbers: n, l, and ml Signup and view all the answers

Which of the following is the most accurate description of the electronic structure of hydrogenic atoms?

Hydrogenic atoms have only one electron, and the electronic structure is free from the complicating effects of electron-electron repulsions. Signup and view all the answers

What is the significance of the discrete frequencies of electromagnetic radiation observed in the emission spectrum of hydrogen?

The discrete frequencies indicate that the electron in a hydrogen atom can occupy only certain energy levels. Signup and view all the answers

Which quantum number is responsible for the observed series (e.g., Balmer, Paschen) in the emission spectrum of hydrogen?

Principal quantum number Signup and view all the answers

What is the relationship between the principal quantum number, $n$, and the energy levels of a hydrogenic atom?

The energy levels are proportional to $n^2$. Signup and view all the answers

Which of the following quantum numbers is not associated with the electronic structure of a hydrogenic atom?

Spin quantum number Signup and view all the answers

What is the key difference between the electronic structure of a hydrogenic atom and a many-electron atom?

Hydrogenic atoms have a simpler electronic structure due to the absence of electron-electron repulsions. Signup and view all the answers

Hydrogenic Atoms and Periodic Table Organization

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