ELEMENTS, COUMPOUNDS, AND MIXTURES

ELEMENTS, COUMPOUNDS, AND MIXTURES

Activity 3.1

I.       Purpose                                 :

To compare between the properties of metal and nonmetal elements.

II.       Basic Theory                         :

              Element is a single substance that only contains one type of atom. Atom is the smallest unit which composedan element. Element can be found in the form of liquid, solid, and gas. Element is a single substance that cannot be disentangled into another substance by using chemical reaction.

              In the universe, most elements are not in free condition. They are chemically combined to produce its compound, for example, iron is found in earth’s skin aas it’s oxide in iron ore. Only some of elements are in free condition as its compounds, for example gold, diamond, and sulfur in the soil, oxygen, nitrogen, and noble gas in the air.

III.       Materials and Equipments      :

·           Metal elements : alumunium, copper, magnesium, zinc, cobalt, and iron

·           Nonmetal elements : silicon and carbon

IV.       Step Work                           :

1.      Shiny property test.

a.      observe the color of the metal elements provided!

b.     Compare it with the colour of the nonmetal elements!

2.     Heat conductor test

Take a zink metal which almost has the same length and diameter with a graphite.

a.    stick a candle in both corners of those two elements!

b.    Heat the other part with rubbing alcohol heater!

c.    Record the time needed for the candle to melt on zinc and graphite by using stopwatch.

V.       Task                                     :

1.     Which is the best heat conductor?

2.    Make the resume and also the report of the activity above!