The Group 1 Elements Flashcards Preview

Chemistry Module 4 > The Group 1 Elements > Flashcards

Flashcards in The Group 1 Elements Deck (9):
1

Explain why group 1 elements are stored under oil?

Because they react with air and react vigorously with water

2

Describe the reaction of lithium, sodium and potassium with water

- hydrogen is formed
- an alkali is formed which is the hydroxide of the metal
- the reactivity with water increases down group 1
- potassium gives a lilac flame

3

Recognise sodium, lithium and potassium as Group 1 elements

They can be recognised by the colours they produce in a flame test

4

Recall the flame test colours for lithium, sodium and potassium compounds

Lithium - red
Sodium - yellow
Potassium- lilac

5

Explain why group 1 elements have similar properties

Because when they reatc, an atom loses one electron to form a psotive ion with a stable electronic structure

6

Describe how to use a flame test to identify the presence of lithium, sodium and potassium compounds

- use of moistened flame test wire
- flame test wire dipped into solid sample
- flame test wire put into blue bunsen flame
- colours of the flames

7

Predict the physical properties of rubidium or caesium given information about the other group 1 elements

The reaction would be very fast, exothermic, violent snd caesium is even more reactive and will react violently with water

8

Explain why a process is oxidation from its ionic equation

Oxidation involves the loss of electrons from an atom

9

Explain why the Group 1 elements are known as the alkali metals

Because the first three elements in the group are lithium, sodium and potassium. They all have one electron in their outer shell which means they have similar properties.