Name ______________________________
ILS
Elements, Compounds & Mixtures Worksheet
Part 1: Read the following information on elements, compounds and mixtures. Fill in
the blanks where necessary.
Elements:
A pure substance containing only one kind of ____________.
An element is always uniform all the way through (homogeneous).
An element _____________ be separated into simpler materials (except during
nuclear reactions).
Over 100 existing elements are listed and classified on the ____________________.
Compounds:
A pure substance containing two or more kinds of _______________.
The atoms are _________________ combined in some way. Often times (but not
always) they come together to form groups of atoms called molecules.
A compound is always homogeneous (uniform).
Compounds ___________________ be separated by physical means. Separating a
compound requires a chemical reaction.
The properties of a compound are usually different than the properties of the
elements it contains.
Mixtures:
Two or more ________________ or _________________ NOT chemically
combined.
No reaction between substances.
Mixtures can be uniform (called ________________________) and are known as
solutions.
Mixtures can also be non-uniform (called ________________________).
Mixtures can be separated into their components by chemical or physical means.
The properties of a mixture are similar to the properties of its components.
Part 2: Classify each of the following as elements (E), compounds (C) or Mixtures (M).
Write the letter X if it is none of these.
___Diamond (C) ___Sugar (C6H12O6) ___Milk ___Iron (Fe)
___Air ___Sulfuric Acid (H2SO4) ___Gasoline ___Electricity
___Krypton (K) ___Bismuth (Bi) ___Uranium (U) ___Popcorn
___Water (H2O) ___Alcohol (CH3OH) ___Pail of Garbage ___A dog
___Ammonia (NH3) ___Salt (NaCl) ___Energy ___Gold (Au)
___Wood ___Bronze ___Ink ___Pizza
___Dry Ice (CO2) ___Baking Soda (NaHCO3) ___Titanium (Ti) ___Concrete
