Elements, Compounds and Mixtures
SNC 2LV
Name:________________
1. a) Circle which of the following are compounds – 2 or more different elements. Answer the questions below.
C
S
C
K
C
S
S
K
S H
C
H H
C
H H
S
H
C
K
C
S
C
K
O
Si
O
b) Is picture showing a pure substance or a mixture?_______________
c) How many compounds are in the mixture? ( # )_____ Write or draw a compound here: Ex. SiO2____________
d) Which elements are shown that are NOT compournds? ___________________________
e) How many pure substances are there in this mixture? ( # )_______
A
B
C
2. a) Are the particles above A & B & C, elements or compounds? ______________________
b) Are these pure substances or mixtures? ________________________
c) Which of the particles above is solid (A or B or C) ? ______ a gas (A or B or C)? ______
d) Give an example of elements on the periodic table that are:
i) solids (Ex. Copper - Cu) ________________________ ii) gases (Ex. Hydrogen gas -H2) _______________
3. Look at the following picture.




a) Is this a pure substance or a mixture? __________________
b) How many pure substances does this mixture have? (#) ___________
c) Are there any elements in this mixture? How many? ______________ List them:
d) How many compounds are there in this mixture? (#) ________
e) What are the compounds? ______________________________________
O
O
O S O
4. Matching: Write the correct letter in the blank given.
i. _____ pure substance that is an element
ii. _____ pure substance that is a compound
iii._____mixture of 2 compounds
iv._____mixture of 2 elements
v._____ mixture of an element & compound
5. Find the letters:
i) __________Which letters show mixtures?
ii) __________Which letters show only elements?
iii) __________Which letters show only compounds?
iv) __________Which letter shows a mixture of
2 elements?
v) __________ Which letters shows a mixture of
2 compounds?
vi) __________Which letter shows an element that
is a solid?
vii) __________Which letters show elements that
are gases?
viii) __________Which letters shows a mixture of
an element and a compound?
ix) ____________________Which letters show a pure substance?
x) __________Which letter show a pure substance that could be water, H2O or carbon dioxide, CO2?
xi) __________Which letter show a pure substance that could be a gas like H2 (hyrdrogen gas) or O2 (oxygen gas)?
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