What was the copernican revolution?

The Nicolaus Copernicus is the revolutionary mathematician and the astronomer who changed the era by his model of the solar system called the heliocentric model.

Before his time people were living in the time where the geocentric model of the solar system by Ptolemy which stated that earth is the centre of the universe.

But the Copernican heliocentric model proposed that Sun is present at the centre of the universe instead of Earth. This model was not accepted at that time but after experiments of Kepler, the model changed the scientific world.

your answer would be “dry”

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.