Name: 
 

7.2 Quiz



Modified True/False
Indicate whether the statement is true or false.  If false, change the identified word or phrase to make the statement true.
 

 1. 

Properties such as boiling point, phase, density, and specific heat are known as chemical properties. _________________________

 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 2. 

As the atomic numbers of elements increase, their atomic weights:
a.
increase.
b.
decrease.
c.
remain the same.
d.
are unrelated to a change in their atomic numbers.
 

 3. 

Steel can be described as all of the following EXCEPT a(n):
a.
mixture.
b.
conductor.
c.
alloy.
d.
element.
 

 4. 

Of the following elements, the one most essential to life on Earth is:
a.
oxygen.
b.
iron.
c.
carbon.
d.
silicon.
 

 5. 

Elements used to make semiconductors for computers include germanium and:
a.
oxygen.
b.
iron.
c.
carbon.
d.
silicon.
 

 6. 

The most abundant element in Earth’s crust is:
a.
oxygen.
b.
silicon.
c.
carbon.
d.
nitrogen.
 

 7. 

An element essential to the manufacture of DNA and glow-in-the-dark plastic is:
a.
fluorine.
b.
phosphorus.
c.
sulfur.
d.
nitrogen.
 

 8. 

Of the following, the best insulator is the element:
a.
zinc.
b.
chromium.
c.
sulfur.
d.
magnesium.
 

 9. 

The element that is shiny in appearance, quite dense and liquid at room temperature is:
a.
silver.
b.
aluminum.
c.
mercury.
d.
zinc.
 

 10. 

When the outermost energy level of an atom is filled, at room temperature, the resulting element:
a.
is often quite dense.
b.
does not interact strongly with other atoms.
c.
occurs as a gas.
d.
generally occurs as a solid.
 

 11. 

Most elements with high melting points have:
a.
filled energy levels.
b.
half-filled energy levels.
c.
empty energy levels.
d.
no other common characteristics.
 

 12. 

A characteristic of elements that demonstrate the strongest periodicity is:
a.
boiling point.
b.
thermal conductivity.
c.
atomic weight.
d.
electrical insulation.
 

Completion
Complete each statement.
 
 
Select the correct term to complete each sentence. There are extra terms in the list.

groupsrowsperiods
noblehalogensmetalloids
alkalinonmetalsperiodicity
 

 13. 

When reading across rows of the period table, patterns of chemical and physical properties tend to be repeated. This pattern is called ____________________
 

 

Short Answer
 

 14. 

Name three elements that are good conductors of electricity.
 

Problem
 

 15. 

The diagram below represents the periodic table of elements. It is shaded in three tones to represent areas in the periodic table where non-metals, metals and metalloids are located.

pr015-1.jpg

Identify the areas in which the three types of elements would be found on the periodic table by placing the letters A, B and C next to the element types.

 Non-metal _____Metal _____Metalloid _____
 

Essay
 

 16. 

Give two reasons silicon is of economic importance.
 

 17. 

What are alloys and why are they widely used? Include two examples of alloys in your answer.
 

 18. 

Most elements are found as solids. One group, the noble gases, is exceptional because the entire group occurs as gases under normal conditions. Explain why this is so.
 



 
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