Determine the half life of a nuclide that loses 38.0% of its mass in 427 hour

the atomic mass is the bottom number on the element.

-steel jelly

i don't know people like to fight everywhere rip.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.