An element belongs to group 2 . What would be its valency? Write the formula of molecules of compounds it will form with elements in 5A,6A and 7A groups.
Answers
Answer:
The valency of an element in group 2 is 2. This means that it has two valence electrons that it can lose in order to form a cation with a charge of +2.
When a group 2 element reacts with an element from group 5A, 6A, or 7A, it will form an ionic compound. The formula of the compound will depend on the charges of the ions involved. For example, when a group 2 element reacts with an element from group 5A, the resulting compound will have a formula of M₂X₃, where M represents the group 2 element and X represents the group 5A element. Similarly, when a group 2 element reacts with an element from group 6A, the resulting compound will have a formula of MX₂, and when it reacts with an element from group 7A, the resulting compound will have a formula of MX.
https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Book%3A_Introductory_Chemistry_Online_(Young)/03%3A_Chemical_Bonding_and_Nomenclature/3.09%3A_Common_Valence_States_and_Ionic_Compounds