Question

all nodel gasses are​

Answer 1

Do you mean noble gases?

If yes, then here is your answer,

He- Helium, at. no. 2

Ne- Neon, at. no. 10

Ar- Argon, at. no. 18

Kr- Krypton, at. no. 36

Xe- Xenon, at. no. 54

Rn- Radon, at. no. 86