Which step should be next in this procedure? .

What are the first three quantum numbers for the electrons located in subshell 2s?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Is this correct if not can u correct me