Element Molar mass (g/mol)
F
19.00
Sr
87.62
Using the information in the table, calculate the number of formula units in a 33.8 g sample of strontium
fluoride (SrF2).
Write your answer in scientific notation using three significant figures.
formula units SrF2

law of conservation of matter

they are all solids.

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.