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I'm melting!

One of the clues that helped you determine the mystery element in "Name that Element!" (pp. 12-14) was the element's high melting point. An element's melting point is the temperature at which it changes from a solid to a liquid. Complete the chart and answer the questions below in complete sentences to learn more about the melting points of a selection of elements from the periodic table. We did the first one for you.

Analyze the Data

1. Which metal has the highest melting point on your chart? Lowest melting point?

2. Which nonmetal has the highest melting point on your chart? Lowest melting point?

3. Ice (solid water) melts at 0[degrees]C (32[degrees]F). Which element on your chart has a melting point nearest to water's melting point?

4. At what temperature (in degrees Celsius) does water boil? Which element has a melting point closest to that temperature?

5. Consider the statement: "Metals always have higher melting points than nonmetals." Use your data to evaluate whether that statement is true or false.

Answer key:

1. Tungsten is the metal with the highest melting point. Mercury is the metal with the lowest melting point.

2. Carbon is the nonmetal with the highest melting point. Helium is the nonmetal with the lowest melting point.

3. Francium is the element with the melting point closest to ice.

4. Water boils at 100[degrees]C (212[degrees]F). Sulfur is the element with the melting point closest to this temperature

5. This statement is false because carbon is a nonmetal and has the highest melting point on the chart. Mercury melts at -39[degrees]C and it is a metal That melting point is lower than that of sulfur and carbon, which are both nonmetals.

Elements and Their Melting Points

                      Melting
                      Point (in
Element     Element   degrees     Metal or
Name        Symbol    Celsius     Nonmetal?

 Helium       He        -272      Nonmetal
Hydrogen                -259
  Neon                  -249
 Oxygen                 -218
Nitrogen                -210
Chlorine                -101
 Mercury                 -39
Francium                  27
Rubidium                  39
 Sulfur                  113
 Silver                  962
  Gold                 1,064
  Iron                 1,535
Tungsten               3,410
 Carbon                3,500

SOURCE: www.webelements.com/periodicity/melting_point

Answer key:

                      Melting
                     Point (in
Element    Element    degrees    Metal or
Name       Symbol    Celsius)    Nonmetal?

 Helium      He        -272       Nonmetal
Hydrogen      H        -259       Nonmetal
  Neon       Ne        -249       Nonmetal
 Oxygen       O        -218       Nonmetal
Nitrogen      N        -210       Nonmetal
Chlorine     Cl        -101       Nonmetal
Mercury      Hg         -39        Metal
Francium     Fr          27        Metal
Rubidium     Rb          39        Metal
 Sulfur       S         113       Nonmetal
 Silver      A9         962        Metal
  Gold       Au       1,064        Metal
  Iron       Fe       1,535        Metal
Tungsten      W       3,410        Metal
 Carbon       C       3,500       Nonmetal
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Title Annotation:CHART-READING SKILLS; chemical elements
Publication:Science World
Geographic Code:1USA
Date:Apr 6, 2009
Words:432
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