The axes of linguistic and semantic structures are based on the attributive relationship (the predicate and the subject), i.e., the pillars, and the verbal and nominal sentences as the nuclei of the linguistic structure. Objectives: - An approximate distribution of semantic spaces among the nucleus and the proposed orbits. - Extracting the factors that contribute to determining the semantic distribution and grammatical functions within the orbits and nucleus. - Identifying the center of semantic gravity (the pillars) and explaining the ranks of the orbits (the remainder): the genitive, the accusative, and the jussive. Methodology: The researcher followed a descriptive and analytical approach. Results: - Semantics are concentrated in the nuclei of the Arabic sentence (the pillars), as no structure or meaning can be constructed without the pillars (the predicate and the subject). Grammarians relied on several factors to determine the center and orbit of semantics, including: lightness and heaviness, the type of vowels, the number of words, and their type (noun or verb). - An approximate distribution of semantics and grammatical functions was established as follows: the nucleus (pillars), the first orbit (genitives), the second orbit (accusatives), and the third orbit (juzm). Conclusion: Meanings and connotations in linguistic structures are distributed among the nucleus and its orbits, similar to the distribution of electrons around the nucleus of an element. The further we move away from the center of the nucleus in both models, the weaker the connection between the distant element and the nucleus, and it can be dispensed with.

Keywords: Nucleus, Orbits, Lightness and Heaviness, Strength and Weakness, Vowels.