C3 Structure & Bonding Flashcards

1
Q

What is a covalent bond?

A

A covalent bond is when two atoms share a pair of electrons.

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2
Q

What is an ionic bond?

A

Ionic bond is the strong electrostatic forces between positve and negative ions.

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3
Q

Which type(s) of element form ionic bonds?

A

Metals and Non-metals

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4
Q

Which type(s) of element form covalent bonds?

A

Non-metals only

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5
Q

Which type(s) of element form metallic bonds?

A

Metals only

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6
Q

What is a metallic bond?

A

A metallic bond is strong electrostatic attraction between postive ions and negative delocalised electrons.

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7
Q

What are examples of giant covalent?

A

Diamond
Graphite
Graphene

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8
Q

Why do ionic substance have a high melting and boiling point?

A

This is due enough energy to break the strong ionic bonds

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9
Q

When can an ionic bond conduct electricity?

A

Molten or Solution(Dissolved in Water)

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10
Q

Why do ionic substances conduct elecrticty in molten or a solution(dissolved in water)?

A

The ions are free to move in these states and they carry a charge.

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11
Q

What molecular ions should you remember?

A

Hydroxide ion
Sulphate ion
Carbonate ion
Nitrate ion
Ammonium ion

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12
Q

What charge ions are Cations?

A

Positive ions

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13
Q

What charge ions are Anions?

A

Negative ions

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14
Q

Are ionic compounds also called salts?

A

True

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15
Q

Why does diamond have a high melting point?

A

It would need a lot of energy to break the covalent bonds.

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16
Q

What is an alloy?

A

Alloys are mixture of metals.