Its atomic number is this clue’s number divided by three Crossword Clue

 The answer to the crossword clue "Its atomic number is this clue’s number divided by three" is beryllium. The clue number is 14, so the atomic number of beryllium is 14 / 3 = 4. Beryllium is a chemical element with the symbol Be and atomic number 4. It is a light metal with a silvery appearance. Beryllium is the lightest of the alkaline earth metals.

Here are some other elements whose atomic number is the clue number divided by 3:

Lithium (atomic number 3, clue number 10)

Boron (atomic number 5, clue number 16)

Carbon (atomic number 6, clue number 20)

Nitrogen (atomic number 7, clue number 21)

Oxygen (atomic number 8, clue number 26)

I hope this helps!

Is there anything else I can help you with?