Definitions:

1. In Chemistry context, refers to the combining capacity of an atom or element, especially how many electrons it can gain, lose, or share to form a chemical bond. NOUN
   • Carbon has a valence of four because it forms four bonds.
2. In Psychology context, refers to the emotional value associated with a stimulus, often described as positive or pleasant, or negative or unpleasatnt. NOUN
   • Happiness has a positive valence, while fear has a negative one.

Synonyms:

• affective value
• bonding capacity
• combining power
• emotional tone