Me with this question. i don’t understand how to do it

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

What type of matter is made of only one kind of atom