Instructions
1) Write your
first and last name in the name box above.
2) Write your teacher’s name in the ID box
above.
3) Write your school’s full name in the email box above.
4) When you have
finished, click the “grade and submit” button.
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1.
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Which substance is classified as an
element?
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2.
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Identify the differences between an element and a
compound.
a. | Element: is a pure substance that is
single type of atom.
Compound: two or more
different elements chemically combined. | b. | Element: is a single type of nuclear particle.
Compound: is a molecule and an electron
chemically combined. | c. | Element :
the same as a compound.
Compound: is
the result of a nuclear reaction. | d. | Element:
two or more atoms that are chemically combined.
Compound: two or more different atoms chemically
combined. |
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3.
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Which of these is a
compound?
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4.
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Which option below contains only
elements?
a. | Na, NaCl, Pb,
C6H12O6 | c. | NH3, KNO3, Hg,
Ne | b. | H2O, H2O2,
H3O, CO2 | d. | He, F, Co, Fe,
Ti |
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5.
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Which of the following
choices includes exactly one compound and one element?
a. | Ti and
Fe | c. | NaCl and CaCl2 | b. | Cu and AgNO3 | d. | K and Ne |
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6.
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Four different compounds are shown
below.
Which element is included in three of
the four compounds shown above?
a. | chlorine | b. | lithium | c. | oxygen | d. | carbon |
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7.
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Examine the following chemical symbols/chemical
formulas.
Two-Part Question
a) Identify the number of compounds displayed
above.
b) Identify two elements that are found in two of theses compounds.
a. | a) Only one compound
b) chlorine (Cl) and hydrogen (H) | b. | a) Four compounds
b) Oxygen (O) and
hydrogen (H) | c. | a) Three
compounds
b) hydrogen (H) and chlorine
(Cl) | d. | a) Two compounds
b) Helium (He) and carbon (C) |
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8.
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Which of these is an
element and not a
compound?
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9.
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A student is
classifying the two substances shown below based on their chemical formulas/chemical
symbols.
Which choice
below correctly classifies these substances?
a. | H2O is a compound
and O is an element. | b. | Both H2O and O are
compounds. | c. | Both H2O and O are elements. | d. | H2O
is an element and O is a
compound. |
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10.
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Which of the following
choices is a compound?
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