The diagram shows a change that occurs to a sodium atom. 11P+ 12N 11P+ 12N Sodium What is happening in the diagram?

What is avogadro’s number, and why is it useful

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.

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn