danielleslaughter510 danielleslaughter510
  • 05-02-2024
  • Mathematics
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Argon (atomic number 18) has a mass of 39.95 amu. Potassium (atomic number 19) has a mass of 39.10 amu. Which element would have appeared first on Mendeleev's table? They were separated by one element between them. potassium They were interchangeable. argon

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