1.3 Bonding Part 1 Flashcards
Define metallic bonding
A metallic bond is the attraction between delocalised outer shell electrons and positive metal ions in a lattice
What is the three dimensional arrangement in a metal called?
A lattice
What does delocalised mean?
The electrons are free to move throughout the structure
What does the term giant mean?
It has no fixed end points
What does the number of delocalised electrons depend on?
How many electrons are lost from each metal atom
Define an ionic bond
It is the electrostatic attraction between oppositely charged ions in a lattice
Between what does ionic bonding occur?
Metals and non metals
What happens to metal atoms in ionic bonding?
They lose electrons and become positively charged
What happens to non metals during ionic bonding?
They gain electrons and become negatively charged
What does boron not do?
Form ions
Which element doesn’t form ions?
Boron
Which elements don’t usually form ions?
Carbon and silicon
What is the formula for a nitrate(III)
NO2-
What is the formula for a nitrate(V)
NO3 -
What is the formula for cyanide?
CN-
What is the formula for a hydrogen carbonate?
HCO3 -
What is the formula for a hydrogen sulfate?
HSO4 -
What is the formula for a sulfate(IV)
SO4 2-
What is the formula for a sulfate(VI)
SO3 2-
What is the formula for a hydrogen phosphate?
HPO4 2-
What is the definition of a covalent bond?
A shared pair of electrons
When does a covalent bond occur?
A reaction between two non metals
When does a double bond form?
When two pairs of electrons are shared
When does a triple bond form?
When three pairs of electrons are shared
What is non-octet molecule?
A molecule where the central atom doesn’t have a noble gas electron arrangement
Define a coordinate/dative bond
A covalent bond in which both electrons of the shared pair come form the same atom
What is the shape of a molecule that has 5 bond pairs and 0 line pairs?
Trigonal bipyramidal
What is the bong angle for a molecule that has 5 bond pairs and 0 lone pairs?
90 and 120
Draw the shape of a molecule that has 5 bond pairs and 0 line pairs e.g) PCl5
- P in middle
- 3 Cl at 90 to each other using straight lines
- 2 Cl 120 apart (top with dashed and bottom with wedge)
What is the bond angle for a molecule that is trigonal bipyramidal?
90 and 120
What is the shape of a molecule that has 4 bond pairs and 0 lone pairs?
Tetrahedral
What is the bond angle for a molecule that has 4 bond pairs and 0 line pairs?
109.5
What is the bond angle for a tetrahedral molecule?
109.5
Draw a bond diagram for a molecule that has 4 bond pairs and 0 lone pairs e.g) CH4
- Carbon in the middle
- Two hydrogen with straight lines
- 2 Hydrogen, one with dashed line, other with wedge
What is the shape of a molecule that has 3 bond pairs and 0 lone pairs?
Trigonal planar
What is the bond angle for a molecule that has 3 bond pairs and 0 lone pairs?
120
What is the bond angle for a molecule that has the trigonal planar shape?
120
Draw a bond diagram for a molecule that has 2 bond pairs and 0 lone pairs e.g) BF3
- B in middle
* 3 fluorine with straight lines
What is the shape of a molecule that has 2 bond pairs and 0 lone pairs?
Linear
What is the bond angle for a molecule that has 2 bond pairs and 0 lone pairs?
180
What is the bond angle for a molecule that has a linear shape?
180
Draw a bond diagram for a molecule that has 2 bond pairs and 0 lone pairs e.g.) BeCl2
- Be in middle
* 2 Cl at either side with straight lines
What is the bond angle for a molecule that has 6 bond pairs and 0 lone pairs?
90
What is the shape of a molecule that has 6 bond pairs and 0 lone pairs?
Octahedral
What is the bond angle for a molecule that has a octahedral shape?
90
Draw a bond diagram for a molecule that has 6 bond pairs and 0 lone pairs e.g.) SF6
- S in middle
- F coming off at top and bottom with straight lines
- F coming off at either side that has dashed lines
- F coming off at either side with wedges
What is different when drawing bond diagrams for double and triple bonds?
Nothing
What is the bond angle for a molecule that has 2 bond pairs and 1 lone pair?
120-2.5 = 117.5
What is the shape of a molecule that has 2 bond pairs and 1 lone pair?
V-Shaped
Draw a bond diagram for a molecule that has 2 bond pairs and 1 lone pair e.g)SnCl2
- Sn in middle
- Lone pair at top with hat
- Cl at either bottom side with straight lines
What is the bond angle for a molecule that has 3 bond pairs and 1 lone pair?
109.5 - 2.5 = 107
What is the shape for a molecule that has 3 bond pairs and 1 lone pairs?
Trigonal Pryamidal
Draw a bond diagram for a molecule that has 3 bond pairs and 1 lone pair e.g. NH3
- N in middle
- Lone pair at top with hat
- Stick H to left
- Wedge H towards you
- Dashed H right
What is the bond angle for a molecule that has 2 bond pairs and 2 lone pairs?
109.5 - 5 = 104.5
What is the shape of a molecule that has 2 bond pairs and 2 lone pairs?
V shaped
Draw a bond diagram for a molecule that has 2 bond pairs and 2 lone pairs e.g. Water
- O in middle
- two lone pairs on top with hats
- Two hydrogen on bottom with sticks
What is the bond angle for a molecule that has 3 bond pairs and 2 lone pairs?
120
What is the shape of a molecule that has 3 bond pairs and 2 lone pairs
Trigonal planar
What is the bond diagram for a molecule that has 3 bond pairs and 2 lone pairs?e.g. ICl3
- I in middle
- Lone pair in top and bottom
- Cl with stick to left
- 2 Cl to the right one on top with dash and one on bottom with wedge
What is the bond angle for a molecule that has 4 bond pairs and 2 lone pairs
90
What is the shape of a molecule that has 4 bond pairs and 2 lone pairs?
Square planar
Draw a bond diagram that has 4 bond pairs and 2 lone pairs e.g. XeF4
- Xe in middle
- Two lone pairs on top and bottom
- F sticking up at either side with dash
- F pointing down at either side with wedge