Learning Task 1: Direction: Based on the history of the Modern Periodic Table, answer the following questions. Write your answers on the space provided.
1. How was the periodic table developed?
2. What are the key features of the periodic table?
1. How was the periodic table developed?
2. What are the key features of the periodic table?
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Answer:
1. In 1869 Russian chemist dimitri mandeleev started the development of the periodic table,arranging chemical elements by atomic mass.
2.elements are arranged in the increasing order of atomic numbers.
Explanation:
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