Ascientist is working with methane (ch4) and butane (c4h10). which statement best compares these chemicals? 1.) they are two different types of molecules that each contain the same number of atoms. 2.)they are two different types of atoms that are each made up of a different number of elements. 3.) they are compounds made of the same two elements, but each contain different numbers of atoms. 4.) they are matter made of the same two compounds, but each contain different types of elements.

3

They are compounds made of the same two elements, but each contain different numbers of atoms.

Explanation:

these nuts

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.