how do you find the energy level of an element?

Question

lik eon the table of elements, how do you find the energy level of like hydrogen?

How do you find the number of electrons in outer energy level of elements? Any of them?

Thank you!

Answer 1

Which energy?

Check out the Periodic Table below. For Hydrogen, the Ionization Potential is listed as 13.598 volts. The electron configuration (energy level of the outer most electron) is 1s^1 (one electron in the 1s orbital).

The rows are the Levels, the columns are the individual orbitals:
I & II are the "s" orbitals (He is "out of place").
IIIB to IIB (under Sc to Zn) are the "d" orbitals.
III to 0 (under B to Ne) are the "p" orbotals.
The Lanthanides & Actinides are the "f" orbitals.