Question

Валентность PH3 И с разбором пожалуйста.

Answer 1

Ответ:

Валентність Гідрогену завжди 1, а Фосфор в фосфіні проявляє валентність 3

Answer 2

Valence of PH3

The valence of a compound refers to the number of electrons that an atom can gain, lose, or share to form chemical bonds. In the case of PH3 (phosphine), the valence of phosphorus (P) can be determined by looking at its electron configuration.

Phosphorus is in Group 15 of the periodic table, which means it has 5 valence electrons. However, in PH3, phosphorus forms three covalent bonds with three hydrogen (H) atoms, resulting in a full octet of electrons around phosphorus. This means that phosphorus shares its 5 valence electrons with the 3 hydrogen atoms, forming a total of 8 electrons around phosphorus.

Therefore, the valence of phosphorus in PH3 is 3, indicating that it can form three covalent bonds with other atoms.

Explanation

Phosphine (PH3) is a compound composed of one phosphorus atom and three hydrogen atoms. The valence of phosphorus in PH3 is determined by its electron configuration and the number of bonds it forms with other atoms.

Phosphorus is located in Group 15 of the periodic table, also known as the nitrogen group. Elements in this group have 5 valence electrons. In the case of phosphorus, it has 5 valence electrons in its outermost energy level.

To achieve a stable electron configuration, phosphorus needs to gain 3 electrons or lose 5 electrons. However, in PH3, phosphorus forms covalent bonds with hydrogen atoms by sharing its valence electrons. Each hydrogen atom contributes one electron to form a covalent bond with phosphorus.

By forming three covalent bonds with three hydrogen atoms, phosphorus achieves a full octet of electrons, which is a stable electron configuration. This means that phosphorus shares its 5 valence electrons with the 3 hydrogen atoms, resulting in a total of 8 electrons around phosphorus.

Therefore, the valence of phosphorus in PH3 is 3, indicating that it can form three covalent bonds with other atoms.