Explain The reason why ionic compound only conduct electricity when in molten or solution
the presence of ions that are free to move to conduct electricity
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15
Explain the reason why metals are malleable and ductile
in a metallic bond, the attractive forces act in all directions. When the layers slide, new metallic bonds are easily re-formed between ions in new lattice pos
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banana
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gift
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rocket
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banana
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lifesaver
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gift
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15
Mention at least 3 properties of ionic compounds
Hard, brittle, high mp and bp, soluble in water, conduct electricity in molten and aqueous state
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15
Explain the reason why metals have high tensile strength and hardness
Due to the strong attractive forces between the metal ions and the delocalised electrons.
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15
The reason why this covalent compounds (Giant Molecular Structure) have high boiling point.
Because of the large number of strong covalent bonds linking the whole structure
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15
What is deffinition of crystal lattice ?
regularly repeating arrangement of ions, atoms or molecules
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15
why is brass stronger than pure copper
Zinc ions are larger than copper ions that makes the arrangement of the lattice less regular. This stops the layers of ions from sliding over each other
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15
Explain the reason why metals can conduct electricity
The delocalised electrons that are free to move to conduct electricity
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rocket
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rocket
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baam
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15
Explain the definition of alloy
Mixture of two or more metals or a metal with a non-metal.
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15
What is the term of structure for compound with ionic lattice in it
Giant ionic Structures
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star
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shark
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lifesaver
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15
The reason iodine (and other simple molecular lattice compound) have low boiling point
because the forces between the molecules are weak van der Waals’ forces
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15
Does iodine and ice as simple molecular lattice can also form crystal?
