Today we dug deep into the causes of trends in electronegativity and atomic radius across periods. We concluded:
- As we go from left to right, the nuclei get larger and can pull harder
- As we go from left to right, the electrons do not get any farther away from the nucleus
- Having more electrons does not change the pull per electron
So at the right of the periodic table, electrons are pulled in tighter, which increases the electronegativity and decreases the atomic radius.
Aim: How can we explain trends in atomic radius and electronegativity across periods?