What are the metals in Group 1 known as? What properties do they have?
The alkali metals. They're soft, they can be cut with a knife. They have low melting points compared with other metals.
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What happens when Group 1 elements (give examples) are put in water? (1)
When lithium, sodium or potassium are put in water, they react vigorously to form hydroxides.
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What does the reaction make? (2)
An alkaline solution (which would change universal indicator to blue or purple) - this is why Group 1 metals are known as the alkali metals.
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What happens as you go down Group 1? (3)
The lone electron is in a shell that's further from the nucleus. As they're further apart, the attraction between the positively charged nucleus and the negatively charged electron decreases. This means the electron is easier to get rid of.
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What does this mean/make? (4)
The elements further down Group 1 more reactive.
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How can you see this? (5)
In the time it takes the different elements to react completely with the water and disappear.
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Describe about Lithium and Potassium (6)
Lithium takes longer than sodium or potassium to react, so it's the least reactive. Potassium takes the shortest time to react of these three elements, so it's the most reactive.
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Describe the trend of Group 1 elements.
The elements in Group 1 get more reactive as the atomic number increases.
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What does the reaction of an alkali metal with water produce? (1)
Hydrogen - this is what you can see fizzing.
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What will a lighted splint indicate? (2)
The hydrogen by making the "squeaky pop" as the H2 ignites.
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What can these reactions be wrote down as? (3)
Chemical equations - e.g. sodium the equation is: sodium + water = sodium hydroxide + hydrogen / 2NA(s) + 2H20(l) = 2NaOH(aq) + H2(g)
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Other cards in this set
Card 2
Front
What happens when Group 1 elements (give examples) are put in water? (1)
Back
When lithium, sodium or potassium are put in water, they react vigorously to form hydroxides.
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