As we move up the group, the distance between the delocalised electrons and the positive nucleus decreases, as such the strengh of the metallic bonds increases.We also see less shielding.
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Exception?
Mg- The lattice structure is diffrent to the elements below, causing it to have a lower melting point.
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Ionisation? IN ALL REACTIONS
Mg --> Mg (2+) + 2e-
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What is the equation for a general group 2 metals reaction with water?
M + 2H2o --> M(OH)2 + H2
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Redox?
0 , +1 --> +2, 0
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What does this form? Uses?
Magnesium hydroxide, milk of magnisia, relieves excesss stomach acid and is a indigestion remedy.
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Mg Reaction with steam is...
Quicker, Mg + h20 --> Mgo + h2
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Trend in solubility for the Hydroxides?
Increases down the group
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Sulfate trend?
Increases up the group
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Example & use?
Barium sulfate, called barium meal, allows us to see xray images.
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How do we use it to test for sulfates?
add nitric acid, then add barium chloride. will form a white precipitate of barium sulfate.
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Other cards in this set
Card 2
Front
How do their melting points increase?
Back
As we move up the group, the distance between the delocalised electrons and the positive nucleus decreases, as such the strengh of the metallic bonds increases.We also see less shielding.
Card 3
Front
Exception?
Back
Card 4
Front
Ionisation? IN ALL REACTIONS
Back
Card 5
Front
What is the equation for a general group 2 metals reaction with water?
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