Si la configuration électronique 1 s^2, 2 s^2, 2 p^5, 3 s^1 est celle d'un atome neutre, quel

step 1 Atom has lowest ionization enthalpy. Lowest ionization enthalpy, which element will have which e

Si la configuration électronique 1 s^2, 2 s^2, 2 p^5, 3...

Si la configuration électronique $1 \mathrm{~s}^2, 2 \mathrm{~s}^2, 2 \mathrm{p}^5, 3 \mathrm{~s}^1$ est celle d'un atome neutre, quelle affirmation est inexacte? A) Le numéro atomique de cet atome est 10. B) L'atome n'est pas dans sa configuration la plus stable. C) L'atome doit recevoir de l'énergie pour passer à la configuration $1 \mathrm{~s}^2, 2 \mathrm{~s}^2$, $2 \mathrm{p}^6$. D) L'atome contient deux électrons célibataires.

Si la configuration électronique $1 \mathrm{~s}^2, 2 \mathrm{~s}^2, 2 \mathrm{p}^5, 3 \mathrm{~s}^1$ est celle d'un atome neutre, quelle affirmation est inexacte?
A) Le numéro atomique de cet atome est 10.
B) L'atome n'est pas dans sa configuration la plus stable.
C) L'atome doit recevoir de l'énergie pour passer à la configuration $1 \mathrm{~s}^2, 2 \mathrm{~s}^2$, $2 \mathrm{p}^6$.
D) L'atome contient deux électrons célibataires.

Key Concepts

Electron Configuration

This concept refers to the distribution of electrons among the different atomic orbitals following specific rules and principles, such as the Aufbau principle, Pauli Exclusion Principle, and Hund's rule. It determines the arrangement of electrons in an atom, which in turn influences its chemical properties and reactivity.

Atomic Number

The atomic number represents the total number of protons in the nucleus of an atom, and for a neutral atom, it also equals the number of electrons. It is a fundamental property that defines the identity of an element and is directly related to its electron configuration.

Ground State vs. Excited State

A ground state configuration is the most stable arrangement of electrons in an atom, where the electrons occupy the lowest available energy orbitals. In contrast, an excited state occurs when one or more electrons are promoted to higher energy orbitals, making the atom less stable until the electrons return to lower energy levels.

Electron Transition Energy

This concept involves the energy required or released when electrons move between different energy levels or orbitals. To shift from one electron configuration to another, such as from an excited state to a ground state or vice versa, the atom must either absorb or release a quantized amount of energy corresponding to the difference in orbital energies.

Spin and Electron Pairing

Electron spin and pairing are crucial concepts in understanding electron configurations. Paired electrons within an orbital have opposite spins, which minimizes electron repulsion and stabilizes the atom. Unpaired electrons, however, can contribute to magnetic properties and increased reactivity due to their unbalanced spin orientation.

Please give Ace some feedback