Why argon (at. mass 39.94) has been placed before potassium (at. mass 39.10) in the periodic table?

Asked by varonika | 4th Aug, 2010, 12:00: AM

Expert Answer:

This is because modern periodic table is according to icnreasing atomic numbers. Since Ar has the atomic number 18 and potassium 19 so Argron is placed before K in the Modern periodic table.

Answered by  | 5th Aug, 2010, 12:36: PM

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