How many lone pairs of electrons are present but not shown in the molecule below? 
Definitions:
Prevalence
The proportion of a population that is found to have a particular condition or disease at a specific time.
Gender Ratio
The numerical relationship between the number of individuals of one gender in comparison to another within a specific population or context.
Population
The total number of individuals or entities in a specified area or group, often used in the context of demographics and statistical analysis.
Schizophrenia
A severe mental disorder characterized by distortions in thinking, perception, emotions, language, sense of self, and behavior.
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