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Refer to the table, answer questions 7-9. Table: Some properties of elements at 25C and 1 atm pressure Hardness or Appearance Electricity conductivity Element Melting Boling point (C) toughness point (C) Shiny, silvery liquid Mercury Yes -39 357 Colourless gas Hydrogen No -259 -253 Iron Shiny, silvery solid Hard and tough Yes 1,538 2,861 Sulphur Yellow solid Hard and brittle No 120 445 Sodium Shiny, silvery solid Soft and tough Yes 98 883 Silicon Shiny, silvery solid Hard and brittle Slightly 1,414 3,265 Boron Black Solid Hard and brittle No 2,030 3,900 Chlorine Yellowish green gas No - 102 -35 Bromine Orange red liquid No -7 59 Oxygen Colourless gas No -219 - 183 Magnesium Shiny, silvery solid Hard and tough Yes 650 1,090 lodine Shiny, dark purple Hard and brittle No 113.5 184.5 Solid 7. Which elements are metals and which are non-metals? 8. Is silicon a metal or non-metal or metallloid? Justify your reason. 9. What are the uses of metals, non-metals and metalloids in daily life? Give examples. 0. Blement A is a solid with shiny ธurfaces, good electricity and heat conductivity, the density Or 7.8 g/cm, boiling point of 1,090 C and melting point of 650 C. Is Element A a metal or non-metal? Justify your reasons. 67

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adjectives ๑ too and enough Comparative and superlative 3.5 than to compare two people or things: Daniel Craig is taller than Zac Efron. structure: (ทot) as + adjective + as: Rupert Grint is not as famous as Daniel Radcliffe Sean Connery is the tallest. Comparative Superlative Adjectives young nice younger the youngest nicer the nicest one-syllable hot hotter the hottest prettier drier the prettiest the driest one- and pretty two-syllable dry ending in -y the most attractive more attractive attractive two-syllable or longer difficult more difficult the most difficult better the best good bad irregular Worse the worst far further the furthest We use too + adjective or not + adjective + enough to talk about a degree of a quality. Too means more than or want" Not enough means 'less than you need or want', You're too young to watch this film. The comedian was not funny enough. yoน need 1 Complete the sentences with the correct form of the adjectives in brackets. 1 New York is (modern) than Barcelona. 2 January is (cold) month of the year. 3 Katy Perry is not as (popular) as Miley Cyrus. 4 This is the (bad) film Ive ever seen. 5 My younger brother is 6 My English isn't as (tall) than me. (good) as my German.

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