Both atoms have separate electron configurations.
The electron configuration for Na is: 1s^2 2s^2 2p^6 3s^1
The electron configuration for Cl is: 1s^2 2s^2 2p^6 3s^2 3p^5
In NaCl, there exists Na+ and Cl- ions and with the electron configuration of [He]2s22p6 (for Na+) and [Ne]3s23p6 (for Cl-)
The valence electron configuration of NaCl₂ can be understood by considering the individual elements: sodium (Na) has one valence electron with a configuration of ( 1s^2 2s^2 2p^6 3s^1 ), while chlorine (Cl) has seven valence electrons with a configuration of ( 1s^2 2s^2 2p^6 3s^2 3p^5 ). In NaCl₂, sodium donates its one valence electron to two chlorine atoms, each of which gains one electron to complete their octet. Thus, sodium becomes Na⁺ and each chlorine becomes Cl⁻, resulting in the overall electron configuration reflecting that sodium has lost its valence electron while chlorine has gained one.
One electron is transferred from sodium to chlorine in the ionic bond between sodium and chlorine in NaCl. Sodium loses one electron to achieve a stable electron configuration with a full outer shell, becoming a positively charged ion (Na+), while chlorine gains this electron to achieve a stable electron configuration, becoming a negatively charged ion (Cl-).
The electron configuration for oxygen is [He]2s2.2p4.The electron configuration for sulfur is [Ne]3s2.3p4.
A cation has a depleted electron configuration.
The electron configuration for beryllium, Be, is 1s22s2.
The electronic configuration of einsteinium is: [Rn]5f11.7s2.
Hydrogen electron configuration will be 1s1.
The electron configuration of francium is [Rn]7s1.
The electron configuration of beryllium is written as [He] 2s2. This means that it has 2s2 electrons above the configuration of Helium.
Uranium electron configuration: [Rn]5f36d17s2
The electron configuration of beryllium is 1s2 2s2.