Amilligram is a millionth of a gram
true or false

false

Explanation:

One gram is equal to 1000 milligrams. One microgram is equal to a millionth of a gram.

i believe the answer is three water molecules

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.