Question

Is the atomic mass or atomic weight on the periodic table written in grams.

Answer 1

Also, I had a question a ways back, it may havebeem skipped over,
Does helium has an ionic radius?
Thank you

Answer 2

With regard to atomic weight or atomic mass see this.
https://www.google.com/search?q=what+unit+is+atomic+mass&ie=utf-8&oe=utf-8

But <b>one mole</b> of the element will weigh that number shown in grams.

with regard to the ionic radius of He and H, I don't have an answer. I didn't skip over it. In fact I tried to answer two/three times and I always erased everything before posting. He forms no compounds under normal conditions so it's ionic radius isn't very useful (in my opinion). A hydrogen ion is just a bare proton so I don't know what an ionic radius for H^+ would mean.