Bonding Flashcards
(26 cards)
How Is a covalent bond formed?
When two atoms share a pair of electrons.
Does metallic bonding have strong or weak electrostaric forces?
Strong
Giant covalent bp and mp are:
High mp and bp
Covalent bonding has weak…. between molecules.
Intermolecular
How is metallic bonding arranged?
Tightly packed and arranged In rows.
Does diamond have delocalised electrons and what does that mean?
No, so it doesn’t conduct electricity.
In covalent bonding, is conduction of electricity possible and why?
No, as its not made of charged particles.
In metallic bonding, is conduction of electricity possible and why?
Yes, as positive metal ions are surrounded by a sea of delocalised electrons.
Are there any bonds between layers in graphite?
No.
In covalent, what is the state at room temperature and why?
Gas or liquid, due to low BP and mp points.
When two pure metals bond, why does it become hard?
The mixture of the metals Introduces different sized metal atoms. The distorts the layers stopping stopping from sliding over one another.
Why do giant covalent structures have high BP and mp points?
A large amount to energy is needed to overcome the strong covalent bonds.
Are pure metals hard or soft?
Soft.
What is graphite an example of?
A gaint covalent structure.
In metallic bonding, what is the heat conduction like and why?
Good, because particles are very dense.
What is diamond an example of?
A giant covalent structure.
What type of bonding has properties of ductile and malleable?
Metallic bonding.
What is diamond used for?
Tools and jewelry.
How is an ion formed?
When an atom looses or gains an electron to gain a full outer shell.
Do metal ion loose or gain electrons, and to form what charge ion?
Loose electrons to form a positive ion.
Do non-metal ions loose or gain electrons, and what charge ion does this form?
Gain electrons to form a negatively charged ion.
Why would a ion formed by negative?
There are more electrons than protons.
Why are ions formed positive?
There are more protons than electrons.
In ionic bonding, are melting and boiling points high or low and why?
High because lots of energy is needed to overcome the electrostatic forces of attraction.
