People: elements on the periodic table...
with certain numbers of protons
and neutrons
and electrons.

Sometimes balanced by another.
Sometimes creating violent reactions.

Some are more stable:
rigid solids.
Some more adaptable:
liquids taking the shape of their container.
Some very unstable and hard to contain:
gases.

Lacks and strengths:
our odd numbers of electrons
driving us to combine
with another atom
to create an even number;

Balance.