The chemical reactivity of metals decreases from top to bottom in the series.
There are three cases where air can charge matter in the absence of external high voltage.
While this holds true in principle for any main-group element, values for the hybridization-specific electronegativity are most frequently cited for carbon.
In the absence of lanthanoid contraction, these values should have been much lower and should have decreased regularly on descending the group.
Also, the energy estimate can be only used for single, not for multiple bonds.
Build a shelter and make some attire.