Review Sheets over Natural World 6. Possible extension to density lab Determine the density of the following objects 1. Block of wood 5. 10 carbon rods 2. 30 hex nuts 3.
Scientists agree that all naturally occurring elements have been found.
B. Atom - smallest particle of an element. A chemical symbol is a shorthand naming system to represent elements. Elements are symbolized with 1 or 2 letters. Chemical symbols are used to make chemical formulas which show how atoms combine to form molecules. C. Examples of Physical Changes 1.