unit C4
- Created by: Andrei stephen
- Created on: 24-04-13 18:01
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- unit C4
- flame tests
- litum = red
- soudium = yellow
- potassium = liliac
- electronic configerration
- how the elctrons are positioned around the nucleas
- the first shell needs 2 electrons to fill it all shells after it need 8 electrons
- as you go along the rows of the perodic tabel the electron shells fill up if it has a full outer shell it will be more stabel
- blanced equations
- total mass of reactans = total mass of products
- no atoms are lost or made during chemical reactions
- how to balance an equation
- write out the word equation
- ues perodic tabel to make symbol equation
- write out the word equation
- ionic covalent and metallic bonding
- bonds are made when two substances share electrons to create a full outer electron shell
- ionic bonding works by substances gaining and losing electrons
- for example soudium and fluorine the sodium would lose an electron giving it a one plus charge and a full outer shell the fluorine than gains that electron giving it a one minus charge and a full outer shell
- most non metals are diatomic as they can only exist stably if two of the same type of atom share electrons
- metallic bonding
- in this outer shell electrons are free to move this actually makes strong electromagnetic forces of attraction holding the metal atoms together this makes a metallic bond
- the periodic table
- group one metals
- they have low melting points
- very reactive
- low boiling points
- soft
- low density's
- become more reactive going down the group
- when added to water makes alkalis
- group seven halogens
- these are all toxic
- they have low melting and boiling points
- they form coloured vapours
- they can be solids liquids or gasses at room temperature depending on the halogen
- halogens can be used for a displacement reaction for example
- sodium bromide + chlorine--> sodium chloride + bromine
- so the bromine has been displaced by the chlorine
- this happens because the chlorine is more reactive so if you were to add iodine to sodium bromide nothing would happen as it is less reactive therefore for a displacement reaction you need a more relative halogen
- so the bromine has been displaced by the chlorine
- sodium bromide + chlorine--> sodium chloride + bromine
- group 0 Nobel gasses
- all have complete outer electron shells
- very unreactive
- known as inert so will not react with anything
- they all have low boiling points which increase as you go own the period
- also have low density's
- group one metals
- flame tests
- atomic structure
- unit C4
- flame tests
- litum = red
- soudium = yellow
- potassium = liliac
- electronic configerration
- how the elctrons are positioned around the nucleas
- the first shell needs 2 electrons to fill it all shells after it need 8 electrons
- as you go along the rows of the perodic tabel the electron shells fill up if it has a full outer shell it will be more stabel
- blanced equations
- total mass of reactans = total mass of products
- no atoms are lost or made during chemical reactions
- how to balance an equation
- write out the word equation
- ues perodic tabel to make symbol equation
- write out the word equation
- ionic covalent and metallic bonding
- bonds are made when two substances share electrons to create a full outer electron shell
- ionic bonding works by substances gaining and losing electrons
- for example soudium and fluorine the sodium would lose an electron giving it a one plus charge and a full outer shell the fluorine than gains that electron giving it a one minus charge and a full outer shell
- most non metals are diatomic as they can only exist stably if two of the same type of atom share electrons
- metallic bonding
- in this outer shell electrons are free to move this actually makes strong electromagnetic forces of attraction holding the metal atoms together this makes a metallic bond
- the periodic table
- group one metals
- they have low melting points
- very reactive
- low boiling points
- soft
- low density's
- become more reactive going down the group
- when added to water makes alkalis
- group seven halogens
- these are all toxic
- they have low melting and boiling points
- they form coloured vapours
- they can be solids liquids or gasses at room temperature depending on the halogen
- halogens can be used for a displacement reaction for example
- sodium bromide + chlorine--> sodium chloride + bromine
- so the bromine has been displaced by the chlorine
- this happens because the chlorine is more reactive so if you were to add iodine to sodium bromide nothing would happen as it is less reactive therefore for a displacement reaction you need a more relative halogen
- so the bromine has been displaced by the chlorine
- sodium bromide + chlorine--> sodium chloride + bromine
- group 0 Nobel gasses
- all have complete outer electron shells
- very unreactive
- known as inert so will not react with anything
- they all have low boiling points which increase as you go own the period
- also have low density's
- group one metals
- flame tests
- aranged in order of assending proton number
- the rows = number of electrons inthe outer shell
- couloms or periods = how many electron shells it has
- atoms are made up of a neclueus eith netrons with no charge and protons with a postive + charge
- it has electrons flying round it bound by strong forces of attraction
- an atom has an overall nutral charge
- unit C4
- the perodic table is a table of elments made by only one kind of atom
- atomic structure
- aranged in order of assending proton number
- the rows = number of electrons inthe outer shell
- couloms or periods = how many electron shells it has
- atoms are made up of a neclueus eith netrons with no charge and protons with a postive + charge
- it has electrons flying round it bound by strong forces of attraction
- an atom has an overall nutral charge
- atomic structure
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