Library›Atomic Numbers and Elements›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaElement

This chemical element has atomic number 20.

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

Calcium has 20 protons in every atomic nucleus. Changing that number would make a different element. Source: Calcium ↗

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 Atomic Numbers and Elements

A few more worth knowing.

  1. 21This chemical element has atomic number 21.RECALL
    Scandium

    Symbol Sc

    Open this card ↗
  2. 22This chemical element has atomic number 22.RECALL
    Titanium

    Symbol Ti

    Open this card ↗
  3. 23This chemical element has atomic number 23.RECALL
    Vanadium

    Symbol V

    Open this card ↗