PGCC CHM 101 - KINDS OF MATTER (2 pages)

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KINDS OF MATTER



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KINDS OF MATTER

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Pages:
2
School:
Prince George’s Community College
Course:
Chm 101 - General Chemistry I

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NAME SECTION PARTNER S DATE KINDS OF MATTER Work in groups of four or less if specified by the instructor Each group should obtain a set of four vials with the Roman numerals I and II on the lids 1 Each of the vials marked I contains a sample of the simplest kind of matter the elements Chemists represent the smallest unit of an element that acts like that element an atom with chemical symbols The symbol for each element is written on the vial The symbol in addition to standing for a single atom also stands for a collection of atoms of that element You would need 115 vials to have a sample of all the known elements Some additional samples of elements are on the front lab table in vials marked with I Examine your samples marked I In each of the bottle diagrams below write the symbol and 3 or 4 physical properties for the element 2 The vial marked II contains a sample of another kind of matter a compound Chemists represent compounds by formulas The formula for the compound is written on the vial Elements and compounds are both referred to as pure substances Write the formula for this compound in the bottle on the right Examine the compound and write 3 or 4 physical properties under the formula From the formula alone what can you say about the composition of this compound Exploring the Chemical World PGCC 2003 21 From the physical properties alone could you have determined the identity of the elements that are combined to make up this compound Explain your answer What general statement can you make about the properties of elements when they combine to form compounds Make an attempt at an explanation for the small number written below one of the symbols Place a very small amount of the three elements from the vials marked I into a small empty beaker or bottle Draw a picture of what you made in the bottle at the right and label it Did you make the compound that is the chemical combination of these three elements Explain your answer The matter in the above bottle is an



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