C4 - Ionic bonding

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How do some atoms have stable electronic structure?
Because they have an outer shell of eight electrons
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What is ionic bonding?
Making atoms stable by transferring electrons
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How do metal atoms get a stable electronic structure?
Lose electrons.
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How do non-metal atoms get a stable electronic structure?
Gain electrons.
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What happens during ionic bonding?
The metal atom becomes a positive ion and the non-metal atom becomes a negative ion. They attract one another.
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How are positive and negative ions held together?
Attraction
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What happens during the bonding of magnesium oxide?
Magnesium atoms lose two electrons to form positive magnesium ions. Oxygen atoms gain two electrons to form negative oxide ions
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What happens during the bonding of sodium oxide?
A sodium atom only has one electron to lose to make a sodium ion, but an oxygen atom needs to gain two electrons to make an oxide ion. Two sodium atoms are needed to provide the two electrons needed so two sodium ions are formed for every oneoxideion
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What is a giant ionic lattice?
Positive ions have strong electrostatic attraction to negative ions. Always exist as solids
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What can sodium chloride solution do?
Conduct electricity
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Define molten
Especially liquids with high melting points, in a liquid form by heat
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When do sodium chloride and magnesium oxide conduct electricity?
When they are molten
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What are the properties of sodium chloride and magnesium oxide?
High melting points as there are strong attractions between positive and negative ions. They do not conduct electricity when solid because the ions cannot move. They conduct electricity when in a solution or molten liquid as ions are free to move
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Why is the melting point of MgO higher than NaCI because?
Each magnesium atom donates two electrons to the oxygen atom, which makes a stronger bond when sodium atoms transfer one electron to chlorine atoms. Magnesium ions are very small in radius so magnesium can get much closer to oxygen: makesbondstronger
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Why is the bond made stronger?
Because more energy is needed to separate these ions
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Other cards in this set

Card 2

Front

What is ionic bonding?

Back

Making atoms stable by transferring electrons

Card 3

Front

How do metal atoms get a stable electronic structure?

Back

Preview of the front of card 3

Card 4

Front

How do non-metal atoms get a stable electronic structure?

Back

Preview of the front of card 4

Card 5

Front

What happens during ionic bonding?

Back

Preview of the front of card 5
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