- #1

elliotyang

- 5

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## Homework Statement

An element has an ionization energy of 1.66 × 10-18 J. The three longest wavelengths in its absorption spectrum are 253.7 nm, 185.0 nm and 158.5 nm.

Construct an energy-level diagram for this element.

## Homework Equations

E=hf=hc/lamda

## The Attempt at a Solution

ionisation energy is the energy required to remove 1 mol of electron from 1 mol of gaseous atom or ion. So the energy different between the two states is between n=? and n=infinity right? i cannot calculate the exact value using rydberg equation because i do not know the element, so cannot plug in the value of the charge in nucleus.

longest wavelengths indicates smallest energy.

when n is increasing, the difference between energy level would be smaller.

so i suppose these three wavelengths are emitted due to the energy difference between ninfinity-ninifinity-1,ninfinity-ninifinity-2, ninfinity-ninifinity-3

so how should i proceed after this?

after doing all these, i still cannot construct energy diagram