Univalent:
* Definition: A molecule or atom that can form one chemical bond.
* Example: Hydrogen (H) has one valence electron and can form one bond with another atom, such as in the molecule H₂.
* Other terms: Monovalent
Multivalent:
* Definition: A molecule or atom that can form more than one chemical bond.
* Example: Oxygen (O) has six valence electrons and can form two bonds, such as in the molecule H₂O.
* Subtypes:
* Divalent: Can form two bonds (e.g., Oxygen, Calcium)
* Trivalent: Can form three bonds (e.g., Nitrogen, Phosphorus)
* Tetravalent: Can form four bonds (e.g., Carbon, Silicon)
* Polyvalent: Can form more than four bonds (e.g., Transition metals like Iron, Copper)
In Summary:
* Univalent: One bond
* Multivalent: Two or more bonds
Important Note:
* Valence is not always directly related to the number of electrons in an atom's outer shell. It can be influenced by factors like the type of bond and the electronegativity of the atoms involved.
* The specific number of bonds an atom forms depends on the specific chemical context and the other atoms it is interacting with.
