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1. Which of the following is NOT an element? Rock Calcium Hydrogen Silicon 2. Elements are pure substances. True or False True False What percentage ofthe crust do "Al" and "Si" make up? 3. about 8% about 36% about 28% about 2% a pure substance made of two or more elements chemically bonded located on the periodic table made of only one type of atom 4. Which statementshouldbe listed under compounds? a pure substance made of two or more elements chemically bonded located on the periodic table both A and C 5. Which statementshouldbe listed under elements? Pure substances made of two or more elements chemically bonded necessary for life made of only one type of atom 6. Which statementshouldbe listed in themiddle? |