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Creado por Miss C Rodgers
hace más de 6 años
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Pregunta | Respuesta |
Why are lithium, sodium and potassium placed in group 1? | They have 1 electron in the outer shell |
Why are they also called alkali metals? | When they react with water they form an alkali solution (lithium hydroxide, sodium hydroxide and potassium hydroxide) |
Why are group 1 metals stored in oil? | The oils prevents them reacting with oxygen |
List 4 properties of group 1 metals that are different to other metals | They have low melting points they are very soft low density (float)react quickly with wter |
What is produced when lithium reacts with water? | Lithium + Water = Lithium hydroxide +Hydrogen(g) |
What is observed when lithium reacts with water? | It fizzes slowly on top of the water |
What is produced when sodium reacts with water? | sodium + water=sodium hydroxide +hydrogen (g) |
What is observed when sodium reacts with water? | It forms a molten ball and fizzes quickly on top of the water |
What is observed when potassium reacts with water? | It produces a lilac flame and moves very quickly on the top of the water |
How can you test for hydrogen gas? | Plunge a lit splint into the test tube of gas. If it produces a squeaky pop, it is hydrogen. |
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