Atomicnumber

2 clues
Physicist's theme song?
Unique identifier using the five vowels
Similar answers:
Acidnumber
Anatomic
Anatomical
Andnowformynextnumber
Anumber
Anumberatrandom
Anumberoftimes
Anumberonenightstand
Areacodenumbers
Arenumbered
Atomic
Atomicage
Atomical
Atomicblast
Atomicbomb
Atomicbombe
Atomicbombs
Atomiccage
Atomicclock
Atomicdog