Answer:
electric charge
Explanation:
A nuclide is represented by the name of the element, preceded by the mass number (A) as a superscript on the left and the atomic number (Z) as subscript.
On the right, as a superscript is the electrical charge (e.g. +2) and is following the element name.
The wall would absorb extra heat during the day when the sun is out, then release the heat back into the room when the sun goes down.
I think cathode should be silver or gold
you can use silver nitrate solution or mercury nitrate solution