structure and bonding

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kit

Cards (24)

What are the three types of bonding between atoms?
Ionic, covalent and metallic
In ionic compounds, electrons are transferred from one atom to another.
What is an ionic bond?
An attraction between oppositely charged ions
What is a covalent bond? 
A bond formed when electrons are shared between atoms
What is a metallic bond?
A bond formed when metal atoms share delocalised electrons
When does ionic bonding occur?
When a metal reacts with a non-metal
When does covalent bonding occur?
When a non-metal reacts with a non-metal
When does metallic bonding occur?
In metals and alloys
Why do atoms of elements react?
In order to get a full outer shell of electrons
Why do Group 0 (noble gas) elements NOT react?
They already have a full outer shell
How does an ionic bond form? 
The metal atoms transfers electrons to the non-metal atom
When Group 1 metals react, what charge do their ions have?
1+
When Group 2 metals react, what charge do their ions have?
2+
When Group 3 metals react, what charge do their ions have?
3+
When Group 7 non-metals react, what charge do their ions have?
1-
When Group 6 non-metals react, what charge do their ions have?
2-
What structure does an ionic compound have?
giant lattice / giant ionic structure
What holds an ionic compound together? 
The strong electrostatic forces of attraction acting between positive and negative ions
What are the limitations of using a dot and cross diagram to represent a giant ionic structure?
A dot and cross diagram does not show how the atoms are arranged in space.
What are the limitations of using a two-dimensional model to represent a giant ionic structure? 
A two-dimensional space-filling model does not show how the next layer of ions is arranged
How do atoms form covalent bonds?
By sharing pairs of electrons
Describe the strength of a covalent bond
Strong
What do most covalently bonded substances consist of?
Small molecules
What is the chemical formula of hydrogen?
H2