Atomic magnets?
The Big Bang Theory Season 7, Episode 24
It's the ATOMIC number for technetium.
The Big Bang Theory Season 6, Episode 8
Helium has
an ATOMIC number of two.
The Big Bang Theory Season 7, Episode 3
My watch is linked to the ATOMIC clock
in Boulder, Colorado.
The Big Bang Theory Season 1, Episode 10
If you multiply that
by the ATOMIC number of "N"--
The Big Bang Theory Season 7, Episode 3