Francium is the biggest element with the lowest ionization energy and electronegativity because:
- Larger atoms have more energy levels and fewer valance electrons than smaller atoms
- It is easy for an atom to lose a valance electron
- and it is hard for an element to gain one
Helium is the smallest element with the highest ionization energy because:
- first row, 1 shell
- 2 protons in the nucleus
- pulls electrons in closer
Noble Gases don't have EN values because they:
- Don't need to gain electrons
- don't react
- have a full shell so they don't need to change.
Fluorine has the highest EN because:
- other than the non noble gases it is the smallest
- it's best at attracting electrons
