Library›Element Atomic Numbers›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaAtomic number

Helium · atomic number

Think it. Then flip it. ahamoraTap to reveal Back to the cue
ScienceOne small aha
Your new aha2

Helium has 2 protons in every atomic nucleus. Changing that number would make a different element. Source: Helium ↗

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 Atomic Numbers

A few more worth knowing.

  1. 03Lithium · atomic numberRECALL
  2. 04Beryllium · atomic numberRECALL
  3. 05Boron · atomic numberRECALL