Library›Chemical Symbols and Atomic Numbers›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaAtomic number

the element Pm · atomic number

Think it. Then flip it. ahamoraTap to reveal Back to the cue
ScienceOne small aha
Your new aha61

Promethium has 61 protons in every atomic nucleus. Changing that number would make a different element. Source: Promethium ↗

ahamoraReference ↗

Keep the thread going

One answer is a beginning.

Share a little curiosity, or follow it into the full collection.

Flip the full deck →

More from Chemical Symbols and Atomic Numbers

A few more worth knowing.

  1. 62the element Sm · atomic numberRECALL
  2. 63the element Eu · atomic numberRECALL
  3. 64the element Gd · atomic numberRECALL
    64

    Gadolinium

    Open this card ↗