13037453
Descrição
FlashCards por Miss C Rodgers, atualizado more than 1 year ago
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Criado por Miss C Rodgers
mais de 6 anos atrás
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| Questão | Responda |
| 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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