Chemical Bonding
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1
What is the definition of crystal?
A regular, repeating arrangement of particles in crystaline solid
2
Where are electrostatic forces found?
In Ionic and mettalic structures
3
What 2 factors increase the strength of ionic bonds?
A larger the charge
A smaller the ions
A smaller the ions
4
What solvents dissolve ionic structures?
Any polar substance (e.g. water)
5
Why do ionic structures dissolve in water?
The water molecules pull ions away from the lattice causing it to dissolve
6
Why are ionic compounds brittle?
When bent, ions with like charges are pushed together causing them to repel and shatter the crystal structure
7
Why are mettalic bonds malleable?
Layers sliding over eachother do not effect the delocalised electrons, so mettalic bonds remain
8
Describe a Covalent bond
A chemical bond where a pair of electrons are shared between 2 atoms
9
How are atoms in a covalent bond held together?
By electrostatic attraction between the nucleus of each atom and shared electrons
10
What is electronegitivity?
The ability of an atom to attract the pair of electrons in the covalent bond towards itself
11
What is a co-ordinate bond?
It is a covalent bond where both electrons in the bond come from just one of the atoms involved
12
How are co-ordinate bonds represented?
With an arrow (->)
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