GCSE Chemistry Unit 3-Trends within the Periodic Table,

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  • Created by: Heather
  • Created on: 08-05-14 20:21
What are Group 1 elements called?
Alkali Metals
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What is the general formula when a Group 1 metal reacts with water?
Group 1 metal + Water -> Group 1 metal hydroxide + hydrogen,
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What densities do these metals have? What does Sodium, litium or Potassium do in water?
They have low densities so Potassium, Lithium and Sodium float on water,
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When the metal's hydroxides dissolve in water, what is formed?
alkaline solutions
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What are the melting and boiling points like in Alkali metals and what do they do as you go down the group?
They have low melting and boiling points and the melting and boiling points decrease as you go down the group,
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What do Alkali metals react with quickly? What does this mean?
Water and air so they have to be in an air tight container,
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What is the reactivity of alkali metals as you go down the group?
Reactivity increases as you go down the group
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Why do alkali metals get more reactive as you go down the groups?
They all have one electron in outer shell, so are unstable as they want to lose an electron in an ionic bond for full outer shell. Going down the group, more shells of electrons are blocking the positive protons in nucleus so electron more easy lost,
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When a Group 1 metal reacts with oxygen, what is formed?
Group 1 metal + oxygen -> Group 1 metal oxide
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Where are the transition metals and between which groups?
They are in the middle of the table between Groups 2 and 3,
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What are their melting and boilign points in tranistion metals like?
High melting and boiling points,
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Why do transition metals have such high melting and boiling points? What feature allows them to have this? (2)
They are strong and hard and have an high density,
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What is the reactivity like in Transition elements comapred to Group 1? Why?
They have low reactivity as they dont react so vigorously with water or oxygen,
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What compounds are created by transition metals?
coloured compounds,
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What are the Group 7 elements called?
Halogens
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All halogens are _ _ _ _ _. Why is this useful? Examples?
Toxic-Chlorine is used to sterilise water in swimming pools. Iodine-used in antiseptics to treat wounds,
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As they are non-metals, what does this means they can't conduct?
They are poor conductors of heat and electricity but good insulators,
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What are the melting and boiling points of Group 7? what does it do as you do down the group?
Low melting and boiling points which increase as you go up the group,
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What is the reactivity of Group 7 elements like? What does it do as you go down the group?
They are less reactive- They decrease in reactivity as you go down the group,
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In Group 7 elements, why does reactivity decrease as you go down the group?
They want to gain one electron through ionic bonding so the more layers of electrons there are, the less strength there is of attraction from the positive protons in the nucleus to attract the electron so less blocking shells of electrons=high reacty
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Other cards in this set

Card 2

Front

What is the general formula when a Group 1 metal reacts with water?

Back

Group 1 metal + Water -> Group 1 metal hydroxide + hydrogen,

Card 3

Front

What densities do these metals have? What does Sodium, litium or Potassium do in water?

Back

Preview of the front of card 3

Card 4

Front

When the metal's hydroxides dissolve in water, what is formed?

Back

Preview of the front of card 4

Card 5

Front

What are the melting and boiling points like in Alkali metals and what do they do as you go down the group?

Back

Preview of the front of card 5
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