Draw Lewis dot diagrams of the reactants and products on the paper with your chemical equation. Select a different color to use for each element in the chemical reaction. Use your chosen color for the element’s symbol and for its valence electrons.
CH4+O2 = CO2+H2O

beta decay is the answer

what are the statements

answerto predict;

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.