Halogens & Noble Gases

[MrFierdausmohd]

i saw the hall,very near from me for the castle of mind of dream every one now..

[GrafPara]

1/5

Wrong facts:

- Flourine is colored pale yellow or white.

- Helium is also a nobel gas

- Why should radon be toxic? It's radioactive, not toxic. All nobel gases aren't toxic at all.

- The effect of fluorine to prevent tooth decay isn't proved. (toxicity of NaF)

- Astatine is radioactive and has a radioactive half life of 8,3h (longest)

In a professional presentation, there shouldn't be music and videos like those. Sorry

[Antharis79]

There is no Helium in the introduce of the noble gases...

[connace123]

idk my bff jill

[takenyami]

hey the vids great, I was wondering what the song is on 00:15.

[EyEPood]

reptilia - the strokes