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Identify the number of electron groups around a molecule with a trigonal bipyramidal shape.
Elderly Population
A group within a society consisting of individuals who are considered to be of an advanced age, often categorized as being 65 years or older.
United States
A country in North America consisting of 50 states and a federal district, known for its diverse geography and multicultural population.
Bulgaria
A country located in Southeast Europe known for its rich history, cultural heritage, and geographical diversity, including mountains, plains, seas, and rivers.
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