Is the atomic mass or atomic weight on the periodic table written in grams.
Also, I had a question a ways back, it may havebeem skipped over,
Does helium has an ionic radius?
Thank you
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 one mole 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.
The atomic mass or atomic weight listed on the periodic table is not written in grams. It is a dimensionless quantity that represents the average mass of an atom of a particular element relative to the mass of an atom of carbon-12, which is assigned a mass of exactly 12 atomic mass units (amu).
To determine the atomic mass of an element, scientists take into account the different isotopes of the element and their relative abundances. Isotopes are atoms of the same element that have different numbers of neutrons. Since different isotopes have different masses, their contribution to the average atomic mass is weighted by their abundance in nature.
The atomic mass unit (amu) is defined as 1/12th the mass of a carbon-12 atom, which is approximately equal to the mass of a proton or a neutron. The atomic mass of an element is expressed in atomic mass units, not grams, because the mass of an individual atom is very small.
So, to answer your question, the atomic mass or atomic weight on the periodic table is not written in grams, but rather in atomic mass units (amu).