Atomic Electron Structure and Quantum Models Quiz

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10 Questions

What is the modern quantum mechanical model's view of electrons around the nucleus?

Electrons are viewed as a diffuse cloud of probability around the nucleus

What are electron orbitals?

Regions of high probability density for finding an electron

How are orbitals organized into shells and subshells?

The number of subshells in a given shell equals the shell number

Which is the mnemonic used to remember the filling order of orbitals?

1s 2s 2p 3s 3p 4s 3d 4p 5s 4f 5d 6s 5f 6d 7s 6p 7p

According to the Pauli Exclusion Principle, what does it state about electrons in an atom?

No two electrons can have the same set of quantum numbers

How is the electron configuration of an atom described?

By specifying the number of electrons in each subshell and orbital

What is the most common shape of an orbital?

$spherical$

In what way does the outdated Bohr model depict electrons around the nucleus?

$As moving in fixed paths around the nucleus$

"What are regions of high probability density for finding an electron" is a definition of what concept?

$Electron orbitals$

"No two electrons in an atom can have the same set of quantum numbers" refers to which principle?

$Pauli Exclusion Principle$

Study Notes

  • The text discusses the electronic structure of atoms, specifically the organization of electrons around the nucleus.
  • The outdated Bohr model of the atom is introduced, which depicts electrons as orbiting the nucleus in distinct shells.
  • The modern quantum mechanical model is then discussed, which views electrons as a diffuse cloud of probability around the nucleus.
  • The concept of electron orbitals is introduced, which are regions of high probability density for finding an electron.
  • Orbitals are organized into shells and subshells, with the number of subshells in a given shell equal to the shell number.
  • Orbitals come in various shapes and sizes, with the most common being s (spherical), p (dumbbell-shaped), d (dumbbell-shaped with four lobes), and f (complex, multi-lobed shapes).
  • The electron configuration of an atom is a way to describe the arrangement of electrons in its orbitals, specifying the number of electrons in each subshell and orbital.
  • The electron configuration of hydrogen is 1s1, carbon is 1s2 2s2 2p2, and titanium is 1s2 2s2 2p6 3s2 3p6 4s2 3d10.
  • Orbitals are filled according to the Pauli Exclusion Principle, which states that no two electrons in an atom can have the same set of quantum numbers.
  • The filling order of orbitals is given by the the mnemonic "1s 2s 2p 3s 3p 4s 3d 4p 5s 4f 5d 6s 5f 6d 7s 6p 7p".
  • The Bohr model is a simplified representation, and the quantum mechanical model is a more accurate description of the electronic structure of atoms.
  • The text also touches upon the concept of wave-particle duality, a fundamental aspect of quantum mechanics, which describes how particles can exhibit properties of both particles and waves.

Test your knowledge of the electronic structure of atoms, including the Bohr model and the modern quantum mechanical model. Explore concepts such as electron orbitals, orbital shapes, electron configurations, filling order of orbitals, and the Pauli Exclusion Principle. Gain insight into the wave-particle duality fundamental to quantum mechanics.

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