Library›Element Chemical Symbols›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaChemical symbol

Actinium · chemical symbol

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

Actinium has 89 protons in every atomic nucleus. Changing that number would make a different element. Source: Actinium ↗

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 Element Chemical Symbols

A few more worth knowing.

  1. 90Thorium · chemical symbolRECALL
    Th

    Atomic number 90

    Open this card ↗
  2. 91Protactinium · chemical symbolRECALL
    Pa

    Atomic number 91

    Open this card ↗
  3. 92Uranium · chemical symbolRECALL
    U

    Atomic number 92

    Open this card ↗