How many outer electrons do all these elements have?
one outer electron
2 of 17
Does the reactivity decrease the further down the group you go?
No, the reactivity increases the further down you go
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Why does the reactivity increase the further down you go?
When alkali metals react they loose outer electron, this is easier further down the group cos the increasing distance means there's less attraction between nucleus & electron, so less energy needed to remove electron
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Do alkali metals form covalent bonds & why?
No, because they form ionic compounds as they easily loose the outer electron
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What do alkali metals react with?
water & dilute acids e.g. hydrochloric acid
6 of 17
How does Lithium react with water/dilute acids?
Lithium- moves around on surface with furious fizzing
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How does Sodium & Potasium react with water/dilute acids?
Sodium & Potasium also move around on the surface with furious fizzing but also melt in the heat of the reaction. Potassium gets so hot that it even ignites the hydrogen gas that is made.
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How does Rubidium & Caesium react with water/dilute acids?
When they get wet they react violently and EXPLODE!!!
9 of 17
What are the physical properties of Alkali Metals?
Low Melting+Boiling Point compared to other metals, Low density, first 3 float on water, they're soft- can cut them with a knife
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How can you test for Alkali Metals?
Using flame tests
11 of 17
What's the word equation for reaction between an alkali metal & water
alkali metal + water ----> a hydroxide + hydrogen gas
12 of 17
What's the word equation for the reaction between Lithium & Water?
Lithium + Water ----> Lithium Hydroxide + Hydrogen Gas
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What's the word equation for the reaction between an Alkali Metal & a Dilute Acid?
alkali metal + dilute acid ----> a salt + hydrogen gas
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What's the word equation for the reaction between Sodium & Hydrochloric Acid?
Sodium + Hydrochloric ----> Sodium Chloride + Hydrogen Gas
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How can you test for hydrogen gas?
Use the Squeaky Pop test ( putting a lighted splint in the hydrogen and u can hear a 'pop' noise)
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Explain why the elements in Group 1 usually form 1+ ions?
The group 1 elements all have 1 outer electron, so losing 1 electron gives them a 1+ charge with a full outer shell/stable electronic structure
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Other cards in this set
Card 2
Front
How many outer electrons do all these elements have?
Back
one outer electron
Card 3
Front
Does the reactivity decrease the further down the group you go?
Back
Card 4
Front
Why does the reactivity increase the further down you go?
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