State the number of hydrogens bonded to each labeled carbon in the following substance and give its molecular formula. (The molecular formula answer is case-sensitive. The order of atoms should be carbon, then hydrogen, then others in alphabetical order.) Hydrogens at carbon a ___ Hydrogens at carbon b ___ Hydrogens at carbon c ___ The molecular formula is

u i forgot 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.  

its b it was a compound