radium
/ˈɹeɪ.dɪ.əm/
A radioactive element once used in glow-in-the-dark paint.
“Radium was used in clocks to make them glow.”
My Deck에 추가
inoh
inoh
/ˈɹeɪ.dɪ.əm/
A radioactive element once used in glow-in-the-dark paint.
“Radium was used in clocks to make them glow.”
My Deck에 추가