An element's atomic number is 99. how many electrons would an atom of this element have?

What is the scientific definition of energy that relates to work

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?

True or false graphs must include scales that increase by the same amount