![♪ Of a radium in a lead jar...
♪ Of a radium in a lead jar...](https://content2.mcqstudy.com/ss/tbbt-12-23-00:01:56.551.jpeg)
♪ Of a RADIUM in a lead jar...
The Big Bang Theory Season 12, Episode 23
![...this is Madame Curie killing herself
by discovering radium.
...this is Madame Curie killing herself
by discovering radium.](https://content2.mcqstudy.com/ss/tbbt-6-4-00:07:16.922.jpeg)
...this is Madame Curie killing herself
by discovering RADIUM.
The Big Bang Theory Season 6, Episode 4
![♪ Six times ten to the eighth
atoms of radium ♪
♪ Six times ten to the eighth
atoms of radium ♪](https://content2.mcqstudy.com/ss/tbbt-12-23-00:01:51.067.jpeg)
♪ Six times ten to the eighth
atoms of RADIUM ♪
The Big Bang Theory Season 12, Episode 23
![Don't you worry about the residual radium
from the luminous dials?
Don't you worry about the residual radium
from the luminous dials?](https://content2.mcqstudy.com/ss/tbbt-2-1-00:14:42.547.jpeg)
Don't you worry about the residual RADIUM
from the luminous dials?
The Big Bang Theory Season 2, Episode 1
![Madam Curie's discovery of radium
turned out to have great potential...
Madam Curie's discovery of radium
turned out to have great potential...](https://content2.mcqstudy.com/ss/tbbt-1-2-00:18:12.507.jpeg)
Madam Curie's discovery of RADIUM
turned out to have great potential...
The Big Bang Theory Season 1, Episode 2