Room No.2 Helium-tchi

He lives in the room No.2 at the Periodic-Table-Apartment(PTA).

He is so-called rare gas that is rarely to play with other Little Elements.

In your lovely earth, he always exists independent. (But he never think he is lonely....)

Because he is lighter than the air and seldom unites with other Little Element to emit energy like heat, he is used to make a balloon float in the air.


His atomic nucleus consists of two protons and two neutrons.

The fact is very important for nuclear physics and a lot of heavy Little Elements release his nucleus and changes its feature.
Your teacher will tell you that it is called alpha collapse.




Other Group 18 elements, noble gas

Room No.10 Neon-tchi 

Room No.18 Argon-tchi

Room No.36 Krypton-kun

Room No.54 Xenon-tchi

Room No.86 Radon-tchi