Suppose there is 0.63 g of HNO3 per 100mL of a particular solution. what is the concentration of the HNo3 solution in moles per liter?
a. 10^3
b. 10^2
c. 10^-1
d. 10 ^-2

beta decay is the answer

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.