Periodic System for Chemists

Your periodic table, always with you.

Use it offline. Find elements quickly. Keep favorites and personal notes on iPhone and iPad.

Back to Helium

Helium series_id

He - Atomic Number 2

series_id
2

About the series_id

Chemical series or category (alkali metals, noble gases, etc.).

Related Properties

BlockPeriodGroup

iPhone & iPad

Your periodic table, always with you.

  • Access element data offline, in the lab or in class.
  • Find elements quickly by name, symbol, or atomic number.
  • Save favorite elements and add your own notes.
Published App Store screenshots: periodic table, element details, and search (English).