5.Write a balanced symbol equation to show the reaction between sodium and water.
2Na +2H 0...................2NaOH + H
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6.How many electrons do halogens have in their outer shell?
7
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7.Describe the appearance and physical states of the following halogens at room temperature and pressure: a)chlorine b)bromine c)iodine
a)Chlorine=fairly reactive, poisonous, low boiling point, green gas. b)Bromine=poisonous, red-brown liquid, gives off raged vapour at room temperature. c)Iodine=dark grey crystalline solid, gives off purple vapour when heated
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8.Describe how the reactivity of the elements changes as you go down Group 7.
As you go down Group 7, the halogens become less reactive-gets harder to attract the extra electron to fill outer shell when it's further away from the nucleus
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9.Give the name of the salt formed when potassium reacts with bromine.
Potassium bromide
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10.Chlorine can displace bromine from potassium bromide. a)write an equation for this reaction. b)Describe the colour change that you would see when this reaction happened.
a)chlorine+potassium bromide............bromine+potassium chloride. b)orange solution formed
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11.Can iodine displace bromine from potassium bromide solution?
No
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12.True or false? The noble gases generally exist as diatomic molecules.
False- they are actually monatomic, which means they are made up of single atoms
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13.Why are the elements in Group 0 inert?
Because they don't react with much at all. The reason for this is that they have a full outer shell of electrons
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14.True or false? The easier it is for a metal atom to form a positive ion, the more reactive it will be.
True
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15.You are given samples of 4 mystery metals and some dilute hydrochloric acid. Briefly describe how you could use these things to work out a reactivity series of the four metals.
Place the metals in the hydrochloric acid. Very reactive metals will fizz vigorously, less reactive metals will bubble a bit, unreactive metals will not react with the dilute acid at all
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16.In a reactivity series, where do you find the least reactive elements?
At the bottom of the reactivity series
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17.Magnesium is above zinc in the reactivity series. Would any reaction happen if a piece of magnesium metal was put in zinc sulphate solution?
Yes, magnesium sulphate and zinc are formed
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Other cards in this set
Card 2
Front
2.List three typical properties of alkali metals.
Back
Low melting and boiling points, low density, very soft
Card 3
Front
3.Explain why Group 1 metals are so reactive.
Back
Card 4
Front
4.Put these alkalis in order of reactivity, starting with the least reactive: potassium, caesium, lithium, sodium.
Back
Card 5
Front
5.Write a balanced symbol equation to show the reaction between sodium and water.
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