Where is the big jump?

The successive ionisation enthalpies of an element show how many electrons it holds loosely. You will find the ratio of each enthalpy to the one before, the number of valence electrons, and the group of the element.

The idea. The enthalpies rise steadily until an electron must come from an inner shell. That step is the biggest jump.

Your tasks.

1. Set ratios to the ratio of each enthalpy to the one before it.
2. Set valence to the number of electrons removed before the biggest jump.
3. Set group to the group: the valence itself for 1 or 2 valence electrons, and 10 plus the valence for 3 or more.