Match the functional dependence of energy E on atomic number Z in List-I with the appropriate phenomenon in List-II.

List 1

1. E ∝ Z²

2. E ∝ (Z - 1)²

3. E ∝ Z(Z - 1)

4. E is practically independent of Z

5. .

List 2

1. Energy of characteristic x-rays

2. Electrostatic part of nuclear binding energy for stable nuclei with mass numbers 30 to 170

3. Energy of continuous x-rays

4. Average nuclear binding energy per nucleon for stable nuclei with mass numbers 30 to 170

5. Energy of radiation from electronic transitions in hydrogen-like atoms