Helium has
an ATOMIC number of two.
The Big Bang Theory Season 7, Episode 3
If you multiply that
by the ATOMIC number of "N"--
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
Now, if you'll excuse me,
the father of the ATOMIC bomb...
The Big Bang Theory Season 4, Episode 3
Atomic magnets?
The Big Bang Theory Season 7, Episode 24