Question

why is argon placed before potassium in the modern periodic table? 250 words remaining

Explanation:

The modern periodic table is arranged by atomic number. Argon has an atomic number of 18, while potassium has an atomic number of 19. So, argon is placed before potassium.

Answer:

Argon is placed before potassium in the modern periodic table because the modern periodic table is organized based on atomic number. Argon has an atomic number of 18, and potassium has an atomic number of 19. Since 18 is less than 19, argon comes first.