Topic 4: Chemical bonding and structure

Question 1

How do valence electrons form metallic bonds?

Answer 1

A sea of delocalised electrons carry a charge between metal cations

Question 2

How do valence electrons form covalent bonds?

Answer 2

2 non-metal atoms have a shared pair of electrons

Question 3

How do valence electrons form ionic bonds?

Answer 3

Electrons transferred from metal cation to non-metal anion, forming strong electrostatic attraction between them

Question 4

What is the charge on an NO3 ion?

Answer 4

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Question 5

When do resonance structures occur?

Answer 5

When there is more than one possible arrangement for a double bond in a molecule

Question 6

What is the term used to describe the actual electronic structure of a species that is considered a mixture or blend of its different resonance forms?

Answer 6

A resonance hybrid of these resonance forms

Question 7

How do you show the idea of resonance?

Answer 7

Link the contributing resonance forms are using a double-headed arrow