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 Ho · atomic number

Think it. Then flip it. ahamoraTap to reveal Back to the cue
ScienceOne small aha
Your new aha67

Holmium has 67 protons in every atomic nucleus. Changing that number would make a different element. Source: Holmium ↗

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. 68the element Er · atomic numberRECALL
  2. 69the element Tm · atomic numberRECALL
  3. 70the element Yb · atomic numberRECALL