Someone check if i got #1 right. if i didn't, show me step by step how to do the problem

Select the atomic models that belong to the same element

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

Which statement best describes the flow of energy in this scenario