"Aspire to do the recycling factor a density challenge" an official from the city of Westminster Mr. Smith tells you that you can have a dump truck full of recycled materials that must be separated and they will pay you $5000 if you can do it unfortunately the job is made more difficult by the fact that someone has ground all of the materials into fine powder making it impossible to separate by hand fortunately Mr. Smith knows what the materials in the truck are as well as the densities, find a way to separate for recycled materials you may need to do this in several steps describe your plan or draw well labeled diagrams to show your plan

answersilicon (si); oxygen (o);

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.  

the term hydride is commonly named after binary compounds that hydrogen forms with other elements of the periodic table. hydride compounds in general form with almost any element, except a few noble gases. the trends and properties vary according to the type of intermolecular force that bonds the elements together, the temperature, its molecular masses, and other components. hydrides are classified into three major groups, depending on what elements the hydrogen bonds to. the three major groups are covalent, ionic, and metallic hydrides. formally, hydride is known as the negative ion of a hydrogen, h-, also called a hydride ion. because of this negative charge, hydrides have reducing, or basic properties. its special characteristics will be further discussed.

explanation: