Multiple choice

Which symbol is used for radium?

  1. R

  2. Re

  3. Ra

  4. Rn
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ra is the chemical symbol for radium, a radioactive alkaline earth metal discovered by Marie and Pierre Curie. R is not used alone, Re is rhenium, and Rn is radon - a different radioactive element.

Keep practicing — related questions