Chemistry C4

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  • Created by: shanaef
  • Created on: 14-12-15 17:28
Name 4 things about the nucleus of an atom
1. Middle of the Atom 2. Contains Protons and Neutrons 3. Positive charge 4. Almost whole mass of atom concentrated in nucleus
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Name 4 things about the electrons in an atom
1. Move around Nucleus 2. Negatively charged 3. Virtually no mass 4. Arranged in shells
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What decides in an atom what element it is?
The number of protons
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State the 4 state symbols and say what they are
(s) - solid (g) - gas (l) - liquid (aq) - dissolved in water
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Name 3 three elements that give off distinctive colours when heated
Lithium - Red flame Sodium - Yellow/Orange flame Potassium - Lilac flame
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What is a Line spectrum?
When heated the electrons in an atom are excited and release energy as light. The wavelengths can be recorded as a line spectrum
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Why do different elements emit different wavelengths of light?
Each element has a different electron arrangement affecting there wavelengths
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How can Line spectrums be used to identify elements?
Each element has a different pattern of wavelengths which means a different line spectrum for each.
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Name the three chemists in order of time who tried to organise the periodic table
Dobereiner, Newlands and Dmitri Mendeleev
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On what side are the metals and non-metals on the periodic table?
Right hand side = non-metals Left hand side = metals
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Is the proton number the higher or lower number on an element in the periodic table?
Lower
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How many electrons are allowed in the 1st,2nd and 3rd shells?
1st = 2 2nd = 8 3rd = 8
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What number do you use to work out the electron configuration of an element?
Proton Number - the lower number
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How are ions made?
Ions are made when atoms gain or lose electrons by trying to get a full outer shell
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What charge is an atom if they lose an electron while trying to gain a full outer shell?
Positive - it becomes a positive ion
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What charge is an atom if they gain an electron while trying to gain a full outer shell?
Negative - it becomes a negative ion
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Give an example of a group that will get rid of an electron to gain a full outer shell?
Group 1
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Give an example of a group that will gain an electron to gain a full outer shell?
Group 7
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What is ionic bonding?
It is a process in which an atom gives up an electron and another gains that same electron, both to gain full outer shells
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What are Group 1 & 7 usually called?
Group 1 - The alkali metals Group 7 - The halogens
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Name 3 similarities between the elements in group 1
1. One outer shell electron 2. Very reactive 3. Shiny when freshly cut
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What happens when a group 1 element reacts with cold water?
They react vigorously and produce Hydrogen. The reaction makes an alkaline solution.
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What happens when a group 1 element reacts with chlorine?
They react vigorously and produce colourless crystalline salts
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Do the elements in group 1 become more or less reactive as you go down the group?
More reactive
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Name a similarity between the elements in group 7
They all have seven outer electrons
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Do the elements in group 7 become more or less reactive as you go down the group?
Less reactive
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Other cards in this set

Card 2

Front

1. Move around Nucleus 2. Negatively charged 3. Virtually no mass 4. Arranged in shells

Back

Name 4 things about the electrons in an atom

Card 3

Front

The number of protons

Back

Preview of the back of card 3

Card 4

Front

(s) - solid (g) - gas (l) - liquid (aq) - dissolved in water

Back

Preview of the back of card 4

Card 5

Front

Lithium - Red flame Sodium - Yellow/Orange flame Potassium - Lilac flame

Back

Preview of the back of card 5
View more cards

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