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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