Examlex
The number of valence electrons in the nitrate anion is ________.
Deficiency
A lack or shortage of something necessary, often referring to a scarcity of vital nutritional elements or vitamins in the body.
Need
A requirement for survival or achieving a specific goal.
Goal
An objective or desired outcome that a person aims to achieve.
Leptin
A hormone, secreted by fat cells, that is associated with decreasing eating behavior based on long-term body fat regulation.
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