Ability Test:Reactivity and Group 2

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  • Created by: Heather
  • Created on: 26-08-14 20:07
Reactivity increases as you go _______ group 2.
Down
1 of 16
Why does reactivity increase as you go down the group?
Group 2 elements want to get rid of their 2 outer electrons. The easiest way is to lose them. Further down the group, the outer electrons are fruther from the postive proton attraction and there are more electron shells shielding this attraction,
2 of 16
what is a factor that can affect the reactivity of Group 2 but in the opposite way? (So a factor for why the reactivity might decrease down Group 2?)
As the elements get larger, they have a larger number of protons in their nucleus which measn a larger attraction between the Protons and Electrons and makes it more difficult to donate these outer electrons,
3 of 16
What is the trend in Group 2 for the melting points?
As you go down Group 2, melting point decreases,
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Why does the melting point decrease as you go down Group 2 ? (simple- a type of bond)
Due to the metallic bonds,
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How are metallic bonds formed in Group 2?
The metallic bond is formed when the outer electrons from each atom breaks free from the nucleus, leaving psotive ions and free electrons.
6 of 16
explain why the metling point decreases as you go down Group 2 involving these metallic bonds?
If there are more electron shells shielding the positive nuclei, there will be a weaker attraction between the psotive ions and the free elctrons made in a metallic bond, causign the metallic bond to be weaker so less energy is required to break it,
7 of 16
In group 7, what do the elements in their elemental state usually form?
Diatomic molecules by covalently bonding with another element of its type like H2,
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What Group 7 element, symbol and word, is a brown liquid at room temperature?
Bromine, Br2
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What is Iodine, I2's properties at room temperature and what happens when it sublimes?
A grey solid but then sublimes to produce a purple vapour,
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What Group 7 element, symbol and word, is a yellow/green gas at room temperatire?
Chlorine, Cl2
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Describe the trend for meltign and boiling point in Group 7?
Meltign and boiling point increases as you go down group 7,
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Why does the melting and boiling point of group 7 increase as you go down group 7?
As the strength of the weak attraction between molecules increases as the number of electrons in the moelcules increases so more energy is required to break these bonds with larger elements,
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Reactivity __________ as you go down Group 7.
decreases
14 of 16
Why does reactivity decrease as you go down Group 7?
As Group 7 elements want to gain 1 electron to gain a full outer shell so the less number of electron shells there are around the nucleus, there will be a stronger positive attraction to the protons in the nucleus so an electron is likely to come,
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What is one way to show the reactivity series between elemetns in Group 7?
With Displacement reactions where a more reactive halogen will dispalce a less reactive halogen
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Other cards in this set

Card 2

Front

Why does reactivity increase as you go down the group?

Back

Group 2 elements want to get rid of their 2 outer electrons. The easiest way is to lose them. Further down the group, the outer electrons are fruther from the postive proton attraction and there are more electron shells shielding this attraction,

Card 3

Front

what is a factor that can affect the reactivity of Group 2 but in the opposite way? (So a factor for why the reactivity might decrease down Group 2?)

Back

Preview of the front of card 3

Card 4

Front

What is the trend in Group 2 for the melting points?

Back

Preview of the front of card 4

Card 5

Front

Why does the melting point decrease as you go down Group 2 ? (simple- a type of bond)

Back

Preview of the front of card 5
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