Neon has the lowest density since it has the smallest atomic size and the lowest atomic number.
The atomic density of an element refers to the number of atoms contained in an element per unit volume.
The size of an atom has an effect on atomic density. The size of an atom increases from left to right across the period and top to bottom down the group.
As such, on the periodic table, as we move from top to bottom down the group, the density of an atom increases.
The atomic element of the given elements are:
Therefore, we can conclude that Neon (Ne) will have the lowest density since it has the smallest atomic size and the lowest atomic number.
Learn more about the Periodic table here:
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