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What Is a Computer? (Generated by artificial intelligence.)📍 Where Are Computers Used?🏫 In Schools: To watch educational videos, study lessons, and write texts🏥 In Hospitals: To store patient information, manage equipment, and assist in surgeries🛒 In Markets: To calculate prices at checkout counters🚀 In Space: To control satellite and rocket systems🏠 At Home: To play games, watch movies, and complete homeworkWhere Are Computers Used? (Generated by artificial intelligence.)⚙️ What Are the P

Thallium is a metal with the symbol Tl and atomic number 81. It has a silvery-white appearance and is a soft, malleable element. It occurs rarely in nature and is found in small amounts within certain minerals.HistoryThallium was discovered in 1861 by the British chemist Sir William Crookes. Its name derives from the Greek word “thallos,” meaning “green shoot,” due to the green spectral line observed in thallium. This discovery was an important example demonstrating that elements could be identi