Chemistry, 04.12.2021 16:00, leannesmith90101
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
Answers: 2
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Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.
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Chemistry, 22.06.2019 06:30, yolo123321
The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams
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Metallic Bonds Worksheet
1. Which statement best compares the melting points of magnesium and sodi...
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