Steel ball weight four kg from a height of 60 m will it fall more rapidly through water at 25 degrees Fahrenheit or water at 45 degrees Fahrenheit. Or will it make no difference?

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Sodium has the lowest first ionization energy in the 3rd row/period.

The work of dmitiri mendeleev surpassed beyond the work of john newlands. the periodic table john newlands proposed is organized into the relative atomic mass, which also has flaws, since the table is mixed up. while, mendeleev's work grouped the elements according to their types/groups such as alkali metals and transistion metals, but it missed one important detail, which is the use of the atomic number.