Could someone help me please

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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)

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.