Starter - Puzzle Time Sodium hydroxide for example 1. 2. 3. 4. 5. 6. Sodium hydroxide for example See dingbat opposite Potassium hydroxide for example This element is supposed to be ‘a girls best friend’ Sir Isaac’s favourite subject Haber – Very famous chemist Dingbat6

Puzzle Time Sodium hydroxide for example See dingbat opposite K A I C A N D A L K I C A R B O N P H Y S I C F R I T Z Sodium hydroxide for example See dingbat opposite Potassium hydroxide for example This element is supposed to be ‘a girls best friend’ Sir Isaac’s favourite subject Haber – Very famous chemist Dingbat6

What am I? My surface looks different to my insides I don’t sink in water I can be cut with a knife I can conduct electricity I am an element

Answer A group 1 metal Sodium Lithium Potassium

Odd one out List 1 Chlorine Carbon Lithium Neon List 2 Zinc Lead Potassium Copper List 3 Sodium Lithium Calcium Potassium List 4 Carbon dioxide Chlorine Krypton List 5 Hydrogen Potassium Lithium Caesium List 6 Sodium hydroxide Carbon dioxide Lithium hydroxide Calcium oxide

Lithium is the only metal Chlorine is the only element not in period 2 Odd one out List 1 Chlorine Carbon Lithium Neon Lithium is the only metal Chlorine is the only element not in period 2

Odd one out Potassium is the only one that is not a transition metal List 2 Zinc Lead Potassium Copper Potassium is the only one that is not a transition metal Potassium is the only one less dense than water

Odd one out Calcium is not a group 1 metal List 3 Sodium Lithium Calcium Potassium Calcium is not a group 1 metal Calcium has two, not one, electron in its outer shell

Odd one out Potassium is the only metal List 4 Carbon dioxide Chlorine Potassium Krypton Carbon dioxide is the only compound Potassium is the only solid (at room temperature)

Odd one out Hydrogen is a non-metal Hydrogen is a gas List 5 Hydrogen Potassium Lithium Caesium Hydrogen is a non-metal Hydrogen is a gas Interestingly all of them have one electron in their outer shell…

Odd one out Carbon dioxide is the only compound without a metal element List 6 Sodium hydroxide Carbon dioxide Lithium hydroxide Calcium oxide Carbon dioxide is acidic whilst all of the others are basic CO2 is a gas whilst the other are solids

Lesson title: Group 1 metals

Group 1: Alkali Metals Lithium Sodium Potassium Rubidium Caesium Element Symbol Reactivity Atomic Radius Melting / Boiling Point Hardness Lithium Sodium Potassium Rubidium Caesium

How could we measure their reactivity?

Group 1: Alkali Metals Li Na K Rb Cs Lithium Sodium Potassium Rubidium Element Symbol Reactivity Atomic Radius Melting / Boiling Point Hardness Lithium Li Lowest Sodium Na Potassium K Rubidium Rb Caesium Cs Highest

Distance - Shielding

Group 1: Alkali Metals Li Na K Rb Cs Lithium Sodium Potassium Rubidium Element Symbol Reactivity Atomic Radius Melting / Boiling Point Hardness Lithium Li Lowest Smallest Sodium Na Potassium K Rubidium Rb Caesium Cs Highest Largest

Group 1: Alkali Metals Li Na K Rb Cs Lithium Sodium Potassium Rubidium Element Symbol Reactivity Atomic Radius Melting / Boiling Point Hardness Lithium Li Lowest Smallest Highest Sodium Na Potassium K Rubidium Rb Caesium Cs Largest

Group 1: Alkali Metals Li Na K Rb Cs Lithium Sodium Potassium Rubidium Element Symbol Reactivity Atomic Radius Melting / Boiling Point Hardness Lithium Li Lowest Smallest Highest Hardest Sodium Na Potassium K Rubidium Rb Caesium Cs Largest Softest

Reaction with water Na(s) + H2O(l) Na(s) + H2O(l) NaOH(aq) + H2(g)

The Alkali Metals Click to start

Which group are the alkali metals? Question 1 Which group are the alkali metals? D Group 0 B Group 2 A Group 3 C Group 1

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The least reactive alkali metal. Question 2 The least reactive alkali metal. B Sodium A Lithium C Potassium D Rubidium

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Which of these alkali metals has the higher reactivity. Question 3 Which of these alkali metals has the higher reactivity. B Potassium A Sodium C Rubidium D Caesium

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What ions do the alkali metals form? Question 4 What ions do the alkali metals form? B +2 A +3 C +1 D -1

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Released when alkali metals react with water Question 5 Released when alkali metals react with water B Oxygen A Hydrogen C Methane D Carbon Dioxide

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Question 6 If universal indicator was added to the resultant solution of question 5 what colour would be seen B Yellow A Red C Green D Blue

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Which element has the chemical symbol Na? Question 7 Which element has the chemical symbol Na? B Sodium A Caesium C Lithium D Potassium

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Which of these is the softest? Question 8 Which of these is the softest? B Lithium A Sodium C Rubidium D Potassium

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Which of these has the largest atomic radius? Question 9 Which of these has the largest atomic radius? B Potassium A Lithium C Rubidium D Francium

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Which has lowest melting point? Question 10 Which has lowest melting point? B Caesium A Lithium C Potassium D Rubidium

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