The wording of your question doesn't quite make sense, but a mole of an element has the same mass in grams as a single atom of that element has in amu. The mole is defined as 6.02 x10^22 things, whether they be atoms or molecules or even moles! 6.02x10^22 atoms of carbon has a mass of 12.01 g, and a single atom of carbon has a mass of 12.01 amu. Hope this helps!
Atoms are generally neutral because they have an equal amount of protons and electrons.
I recently wrote a paper on animal testing
Pretty sure it was Galen
-19.15 degrees Celsius. 254k-273.15=-19.15
You have to subtract 273
