Science - C4 - Groups and Metals & Water 0.0 / 5 ? Applied ScienceC4 - Groups and Metals&WaterGCSEOCR Created by: chlo-smallmanCreated on: 19-02-14 16:21 Group No. = No. of electrons in outside shell Group 1 metals have similar properties as they all need to lose one electron from their outside shell. 1 of 7 Rubidium and caesium are group 1 metals which react VIOLENTLY which water to give off hydrogen and make an alkaline solution. Flame tests can be used to identify the presence of LITHIUM, SODIUM and POTASSIUM. 2 of 7 If a GROUP1 metal reacts with a GROUP7 non-metal the word equation for the formation of a metal halide can be constructed. CHLORINE is a GREEN GAS BROMINE is a BROWN LIQUID and IODINE is a GREY SOLID 3 of 7 COPPER compounds are often BLUE, iron(II) compounds are often light green and iron(III) compounds are often orange/brown. The thermal decomposition of transition metal carbonates results in the metal oxide and carbon dioxide being made. 4 of 7 Cu ions react with sodium hydroxide to make a blue solid in a precipitation reaction. Metals have high melting points due to their strong METALLIC bonding. 5 of 7 SUPERCONDUCTORS conduct electricity with little or no resistance. Drinking water is purified by filtration, sedimentation and chlorination. 6 of 7 Sulfates in water can be tested using barium chloride. Halides can be tested using silver nitrate. 7 of 7
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