Name the separation technique illustrated in the picture. chemistry homework 80 points!

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

When a septic tank backs up a goes in to clean it out

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.