Name__________________________
Period____________________________
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ELEMENTS, COMPOUNDS, and MIXTURES
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Atom
change
Compound
element
Directions: Fill in the blank with the correct word from the text box. Not all words
Formula
matter
from the list will be used.
Mixture
molecule
1. A(n) _____________________is the smallest particle of matter.
One
oxygen
2. A(n) _____________________is a substance made of one kind of atom.
Periodic
three
3. A chemical ______________________is one or two letters used represent an
two
water
element.
4. A compound is made of _______________________or more different elements.
5. Water is a compound made of the element hydrogen and ___________________________.
6. A(n) _______________is the smallest piece of matter that still has properties of the original matter.
7. H20 is the chemical formula for ________________________________________.
8. A ________________________________________is matter made of two or more different substance.
9. The substances in a mixture do not ________________________________________.
10. The Modern ______________Table is a chart containing all the known elements.
Circle the correct classification for each of the following.
1. Sand
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
2. Salt
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
3. Pure Water
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
4. Soil
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
5. Soda
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
6. Pure Air
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
7. Carbon Dioxide
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
8. Gold
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
9. Bronze
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
10. Oxygen
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
11. Salad Dressing
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
12. Salt Water
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
In the spaces provided, describe the distinguishing characteristics of the major categories of matter.
13. Element –
14. Compound –
.
15.
Homogeneous Mixture -
16.
Heterogeneous Mixture –
Notes:
Elements
An element is defined as a pure substance made up of one type of atoms and cannot be
further subdivided into simpler substances by any physical or chemical means.
An element can be represented by using a symbol.
Examples of Elements
The symbols H2 and Fe represent the elements Hydrogen and Iron respectively.
Compounds
A compound is defined as a pure substance made up of two or more types of elements
(atoms) chemically combined in a fixed proportion, and it can be further subdivided into
simpler substances by chemical means only.
A molecule is the smallest part of a compound, whose properties are the same as those
of the compound.
A compound can be represented by using a chemical formula.
Examples of Compounds
The chemical formulae H2O and FeS represent the compounds water and Ferrous
sulfide (Iron [I] sulfide) respectively.
Mixtures
A mixture is defined as an impure substance made up of two or more types of elements
(atoms) or compounds or both mechanically mixed in any proportion, and it can be
further subdivided into simpler substances by physical (mechanical) means.
The constituents of a mixture retain their original properties.
The constituents of a homogenous mixture are uniformly mixed thoroughout the
mixture. The properties and composition of a homogenous mixture are the same
throughout the mixture.
The constituents of a heterogenous mixture are not uniformly mixed thoroughout the
mixture. The properties and composition of a heterogenous mixture are not the same
throughout the mixture.
Examples of Mixtures
Stainless steel is a mixture (alloy) of iron, carbon, chromium, and nickel. Carbon gives
hardness to the mixture. Chromium and nickel give a silvery look to the mixture.
Potassium sulfide solution is a homogenous mixture.
A mixture of water and oil is heterogenous in nature.