3rd question attached below! (╹ڡ╹ ) 4. Draw an energy diagram for an endothermic reaction without a catalyst (use a solid line) and with a catalyst (use a dotted line). Label all parts of the diagram. Explain what a catalyst is and how a catalyst influences the rate of a reaction.

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

The number at the end of an isotope’s name is the number.

Which terms are used to identify pure substances