2. Physical properties of metals METALS Solid state at room temp Shiny appearance High density Good heat conductors Good conductors of electricity High Melting and Boiling point Ductile and malleable Strong and tough Except Mercury (Liquid) Due to strong forces (metallic) except Mercury and alkali metals Due to the presence of mobile ions Can be bent and stretched without breaking Atoms are closely packed Due to the presence of mobile ions
7. METALS CHEMICAL PROPERTIES PHYSICAL PROPERTIES have REACTIVITY OF METALS includes REACTIVITY SERIES Arranged in Most reactive Least reactive Dilute acids Cold water Steam Determined by the reaction Discussed in last lesson Reduction of metal oxides Decomposition of metal carbonates An Overview
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9. Metals I II III IV V VI VII O 11 Fe 26 Cu Zn 30 29 Ag 47 Na 11 Mg 12 K 19 Ca 20 Pb 82 H 1
10. R E A C T I V I T Y MOST REACTIVE METAL LEAST REACTIVE METAL Potassium (K) Sodium (Na) Calcium (Ca) Magnesium (Mg) Zinc (Zn) Iron (Fe) Lead (Pb) (Hydrogen) Copper (Cu) Silver (Ag) P lease S end C ats M onkeys Z ebras I nto L ovely H appy C ages S oon Non-metal Reactivity Series
11. MOST REACTIVE METAL P lease S end C ats M onkeys A nd Z ebras I n L arge H ired C ages M ake S ure P roperly G uarded Potassium (K) Sodium (Na) Calcium (Ca) Magnesium (Mg) Aluminium (Al) Zinc (Zn) Iron (Fe) Lead (Pb) (Hydrogen) Copper (Cu) Mercury (Hg) Silver (Ag) Platinum (Pt) Gold (Au) R E A C T I V I T Y LEAST REACTIVE METAL
15. Water Aqueous Potassium hydroxide Hydrogen gas Violent reaction Testing of hydrogen gas: Lighted splint goes off with a ‘pop’ sound Potassium Test for hydrogen gas “ POP”
23. K > Na > Ca > Mg > Zn > Fe > Pb > Cu > Ag Increasing reactivity Decreasing reactivity Using Experimental Observations Reactivity of Metals
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28. Question to ponder! If dilute sulphuric acid (H 2 SO 4 ) is used instead of dilute hydrochloric acid (HCl) for reaction with the metals. Predict what you will observe and the products formed if any.
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31. Metals Reactivity Water Decomposition of metal carbonates Reduction of metal oxides Dilute acids Steam Recall… Arranged via Determined by reaction with
43. Metals Reactivity Water Decomposition of metal carbonates Reduction of metal oxides Dilute acids Steam Recall… Arranged via Determined by reaction with Displacement reactions in the next lesson