Question

Intext : Why did Mendeleev place potassium (atomic mass 39) of low atomic mass after argon (atomic mass 40) of higher atomic mass in the periodic table? 

  • Periodic Table
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Answer

Question

Why did Mendeleev place potassium (atomic mass 39) of low atomic mass after argon (atomic mass 40) of higher atomic mass in the periodic table? 

Answer

Mendeleev placed potassium after argon in the periodic table because potassium exhibits similar chemical properties to other Group 1A elements, and placing it in that group maintains the periodicity of properties.

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