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markscheme and examiner report 2 2

1.3 The Alkali Metals Objective: To explain the properties and reactions of the alkali metals. Outcomes: All: I can identify the alkali metals and where they are situated on the periodic table (D/E) Most: I can describe some properties of the alkali metals(C) Some: I can explain how their reactivity changes down the group linked to electronic structure and write equations for reactions with water and chlorine (A/B) Keywords: alkali metal, hydroxide, ionic 3

React with oxygen in air, kept under oil. Soft, can cut with knife. Properties of The Alkali Metals React with oxygen in air, kept under oil. Soft, can cut with knife. Shiny, until react with air. Low density, float on water. Melting points and boiling points are low (caesium liquid at 29˚C) Review as doing water reaction demo, and then write them up in their books around the periodic table group that they have drawn. Use brainiac video to demonstrate Rb and Cs. Most: I can describe some properties of the alkali metals(C) 4

Write i) word and ii) balanced symbol equations (with state symbols) for the reactions of 2 alkali metals with…. water Some: I can explain how their reactivity changes down the group and write equations for reactions with water (A/B) EXTENSION: Can you write the ionic equation? students to determine word and symbol equations for reaction with water following water demo 5

Write i) word and ii) balanced symbol equations (with state symbols) for the reactions of 2 alkali metals with…. chlorine Some: I can explain how their reactivity changes down the group and write equations for reactions with water (A/B) EXTENSION: Can you write the ionic equation? students to determine word and symbol equations for reaction of sodium with chlorine after demo/video, note other halogens react in a similar way. 6

Write a paragraph to explain why the reactivity of the group 1 elements increases down the group. The following words may help you: Electron, nucleus, atom, shell, ion, positive, shield Some: I can explain how their reactivity changes down the group linked to electronic structure (A/B) 7 7

1.3 The Alkali Metals Objective: To explain the properties and reactions of the alkali metals. Outcomes: All: I can identify the alkali metals and where they are situated on the periodic table (D/E) Most: I can describe some properties of the alkali metals(C) Some: I can explain how their reactivity with water changes down the group and write equations for these reactions (A/B) Keywords: alkali metal, hydroxide, ionic 9