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Metallic Bonds Worksheet


1. Which statement best compares the melting points of magnesium and sodium?

A. Magnesium has a higher melting point because it contributes one

additional electron per atom than sodium in the electron sea.

B. Magnesium has a higher melting point because it contributes two

additional electrons per atom than sodium in the electron sea.

C. Sodium has a higher melting point because it contributes one fewer

electron per atom than magnesium in the electron sea.

D. Sodium has a higher melting point because it contributes two fewer

electrons per atom than magnesium in the electron sea.


2. If you wanted to make a crucible for melting sodium (Na), which metal would be

most suitable for that purpose?

A. calcium (Ca)

B. rubidium (Rb)

C. lithium (Li)

D. potassium (K)


crucible

3. Scientists at a metallurgic factory are testing different metals to study the

strength of the electrical forces between their atoms. They determined the force

needed to bend a sheet of each metal and found that Metal A requires 50 N of

force, Metal B requires 30 N, Metal C requires 70 N, and Metal D requires 100 N.

Which metal will have the lowest melting point?

A. A

B. B

C. C

D. D


Read the passage and use the diagram to answer the next two questions.

The image shows a diagram for a suspension bridge such as the Golden Gate.

There are metal elements in the suspenders, towers, cables, and especially the

surface. The engineers who design bridges need to consider the properties of

metals, such as ductility and malleability.


4. If a big force acts on the metal towers of the suspension bridge, the tower will not

break into pieces like glass, but will bend instead. Which property of metals

explains this phenomenon?

A. brittleness

B. conductivity

C. ductility

D. malleability


5. Metal suspenders are required for the new bridge, and you will need a metal with

high ductility that can be drawn into long wires with ease. You test the elongation

of three different metals against the force, and the results are shown in the graph:


What is the correct order of the metals according to their suitability to be used for

suspenders? The least suitable metal will be first, and the most suitable will be

last.

A. A, B, C

B. B, A, C

C. C, B, A

D. A, C, B

i need aall the answers

Metallic Bonds Worksheet1 Which Statement Best Compares The Melting Points Of Magnesium And SodiumA Magnesium Has A Higher Melting Point Because It Contributes class=

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Magnesium has a higher melting point than sodium. Calcium is used for the crucible because it has a higher melting point than sodium.

The melting and boiling points of metals increase across the period. Magnesium has a higher melting point because it contributes one additional electron per atom than sodium in the electron sea.

The crucible that will be used for melting sodium must have a higher melting point than sodium. Therefore, a calcium crucible should be used.

The metal that has the lowest melting point must be the metal that has the lowest density and therefor is easiest to bend. That is metal B.

A very important property of metals is ductility. It allows a metal to be drawn into sheets without breaking. Hence, the property of metals that explains the fact that the towers of the bridge does not break into pieces like glass but rather bends is called ductility.

Examining the graph that shows the test the elongation of three different metals against the force, is the correct order of the metals according to their suitability to be used for suspenders is A, B, C.

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