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Five students were looking at a large poster of the periodic table. They noticed the elements were arranged in rows and columns. They also noticed the elements were nged in order from 1-118. They had different ideas about the arrangement of the elements on the periodic table. This is what they said:

Damon: I think the elements are arranged by increasing mass.

Flo: I think the elements are arranged according to their properties.

Sienna: I think the elements are arranged by when they were discovered.

Kyle: I think the elements are arranged according to how common they are.

Glenda: I don't agree with any of you. I think there must be a different reason for the arrangement.

WHO DO YOU AGREE WITH?