What is the kernel method in chemistry?

The kernel energy method (KEM) combines structural crystallographic information with quantum mechanical theory. KEM may be described as the determination of the quantum mechanical molecular energy by the use of the parts of a whole molecule, which are referred to as kernels.

What are the 4 types of electron configuration?

The four different types of orbitals (s,p,d, and f) have different shapes, and one orbital can hold a maximum of two electrons. The p, d, and f orbitals have different sublevels, thus can hold more electrons. As stated, the electron configuration of each element is unique to its position on the periodic table.

What is kernel in metallic bond?

The kernel is an atom without its valence electrons that are weakly bonded; no electron belongs to one nucleus, valence electrons can move one kernel to another. So it is known as kernel, not cation (have valency).

What is the difference between kernel and valence electrons?

The electrons of an atom are typically divided into two categories: valence and core electrons. Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels.

What is the noble gas configuration?

A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of [Ne] for the 1s22s22p6 part of the configuration.

What is the electronic configuration of periodic table?

For representative elements the number of valence electrons is the same as the periodic group number, and the number needed to match the next noble-gas configuration is 8 minus the group number….5.17: Electron Configurations and the Periodic Table.

Z Element Configuration
15 P [Ne] 3s 2 3p3
16 S [Ne] 3s 2 3p4
17 Cl [Ne] 3s 2 3p5
18 Ar [Ne] 3s 2 3p6

What is SPDF in electron configuration?

Spdf or SPDF may refer to: Electron configuration, for which there is an obsolete system of categorizing spectral lines as “sharp”, “principal”, “diffuse” and “fundamental”; also the names of the sub shells or orbitals.

What is 1s2 2s2 2p6?

b. 1s2 2s2 2p6 This represents 2 electrons in the s subshell of the first energy level , 2 electrons in the s subshell of the second energy level and 6 electrons in the p subshell of the second energy level.